SOCORICO

The Society for Costa Rica Collectors

INDEX TO COSTA RICAN PHILATELIC LITERATURE

Chronological by Issue

Compiled and Edited by

Hector R. Mena

Published by

Society of Costa Rica Collectors

Abbreviations

  • Am Phil: American Philatelist
  • AFCR: Asociacion Filatelica de Costa Rica
  • AFCRBol: Bulletin of the AFCR
  • CAN: Central American Newsletter
  • CR: Costa Rica
  • CA: Central America
  • CRFil: Costa Rica Filatelica
  • c: centimos or centavos
  • C: colones
  • Cortel: Correos y Telegrafos (Costa Rica Postal Service)
  • EraOro: Era de Oro de la Filatelia Costarricense
  • FilJov: Filatelia Kovem
  • FDC: First day cover
  • LAPost: Latin America Post
  • LA: Latin America
  • Panor: Panorama
  • PO: Post Office
  • Ox: The Oxcart
  • RFC: Repertorio Filatelico Costarricense
  • SOCORICO: Society of Costa Rica Collectors
  • Sc: Scott Catalogue number
  • SpAmPhil: Spanish American Philatelist
  • UPU: Union Postal Universal

Section Indices

Author Index
Chronological Index By Stamp Issue
Subject Index

Chronological Index By Stamp Issue

1863

  • First Issue Stamps Used in Combination with British Stamps, Alvarez, Ricardo, RFC 119:4-5, 1990
  • Cancellations on the First Issue, Bialikamien, Enrique, RFC 45:2, 1983
  • Now it can be Told (1st Issue), Cohen, Alex, Ox 72:76-77, 1978
  • A CR Rarity and a New Discovery (1st Issue), Cohen, Alex, Ox 75:50, 1979
  • First Issue Sample Book Stamps (Addendum), Fossum, Earl, Ox 59:53, 1975
  • First Issue Sample Book Stamps, Fossum, Earl, Ox 55:37-38, 1974
  • First Issue Proofs, Moya, Alfredo, RFC 53:2, 1984
  • First Issue Stamps on Certified Mail, O'Neill, Fred, CRFil 88:11-4, 1976
  • Centenary of the First Issue, O'Neill, Fred, CRFil 88:15,7, 1976
  • Special Use of the Medio Real, O'Neill, Fred, RFC 02:5-6, 1979
  • Cancellations on the First Issue, O'Neill, Fred, RFC 03:2, 1979
  • Interesting "Un Peso" Stamps, O'Neill, Fred, RFC 21:4-5, 1981
  • Last Day of Use for the Medio Real, O'Neill, Fred, RFC 29:6, 1982
  • Postal Use of the Second Plate of the Medio Real, O'Neill, Fred, RFC 38:6-11, 1983
  • Postage Due Markings on the First Issue, O'Neill, Fred, RFC 39:5-7, 1983
  • Dates on First Issue Covers, O'Neill, Fred, RFC 43:1, 1983
  • Cancellations on the First Issue, O'Neill, Fred, RFC 03:2, 1979
  • Last Day of Use for the Medio Real First Issue, O'Neill, Fred, RFC 29:6, 1982
  • Special Use of the Medio Real, O'Neill, Fred, RFC 02:5-6, 1979
  • Postage Due Markings on the First Issue, O'Neill, Fred, RFC 39:5-7, 1983
  • Essays of the First Issue, O'Neill, Fred, RFC 51:6, 1984
  • Salesman Samples of the First Issue, O'Neill, Fred, RFC 64:6-7, 1985
  • First Issue 125st. Anniversary, O'Neill, Fred, RFC 96:1, 1988
  • A Complete Sheet of 4 Reales, O'Neill, Fred, RFC 143:4-5, 1992
  • Essays of the First Issue, O'Neill, Fred, RFC 51:6, 1984
  • A Discussion on the First Issue, Reuben, William, Ox 75:38-49, 1979
  • Further Comments on the First Issue, Reuben, William, CRFil 91:19-20, 1979
  • Cancellations on the First Issue, Reuben, William, RFC 16a:1-9, 1980
  • Cancellations on the First Issue, Reuben, William, RFC 16a:1-9, 1980
  • A Discussion on the First Issue, Saenz, Carlos, Ox 75:38-49, 1979
  • A Discussion on the First Issue, Saenz, Carlos, CRFil 87:11-25, 1975
  • Further Comments on the First Issue, Saenz, Carlos, CRFil 91:19-20, 1979
  • Cancellations on the First Issue, Saenz, Carlos, RFC 17:3-6, 1980
  • Perforations of the 1863 Issue, Saenz, Carlos, RFC 40:4-8, 1983
  • Perforations of the 1863 Issue, Saenz, Carlos, RFC 41:2-5, 1983
  • Postage Due Markings on the First Issue, Saenz, Carlos, RFC 41:6-7, 1983
  • Interesting First Issue Cancellation, Saenz, Carlos, RFC 58:2, 1984
  • Double Impression on Sc 1, Saenz, Carlos, RFC 65:1, 1985
  • Interesting Cover of the First Issue, Saenz, Carlos, RFC 94:3-4, 1988
  • Two Interesting Covers of the First Issue, Saenz, Carlos, RFC 101:2-3, 1989
  • Unknown Postal Marking on the First Issue, Saenz, Carlos, RFC 123:2-3, 1991
  • Postal Service Organization and Authorization of 1863 Stamps, Saenz, Carlos, RFC 126:4-6, 1991
  • First Issue History, Proofs, Perforations, Forgeries, Cancels, Saenz, Carlos, EraOro 7-88, 1984
  • First Issue Proofs, Saenz, Carlos, EraOro 19-22, 1984
  • First Issue Printing, Saenz, Carlos, EraOro 32-37, 1984
  • First Issue Perforations, Saenz, Carlos, EraOro 23-31, 1984
  • First Issue Plate Varieties, Saenz, Carlos, EraOro 39-51, 1984
  • First Issue Forgeries, Saenz, Carlos, EraOro 59-62, 1984
  • First Issue Postal Cancellations, Saenz, Carlos, EraOro 63-78, 1984
  • First Issue Covers, Saenz, Carlos, EraOro 78-88, 1984
  • Two Interesting Covers of the First Issue, Saenz, Carlos, RFC 101:2-3, 1991
  • "San Ramon" Cancel on Sc 1, Ox 84:84, 1981
  • Illustration "Cuatro Reales", CRFil 91:24, 1979
  • Number of Stamps Sold in 1879, Ox 55:52, 1974
  • Illustration of a Cover, CRFil 91:24, 1979
  • Illustration of Scott 3, , RFC 01:3, 1979
  • Circulation Dates of the Medio and Dos Reales Stamps, RFC 17:11, 1980
  • Illustration Cuatro Reales with Double Transfer, Ox 76:102, 1979
  • Cover with No. 3 at Auction, Ox 112:74, 1988
  • Illustration of a Block of 25 of 1 Peso First Issue, RFC 144:3, 1992

1870

  • The First Revenue Issues of 1870 and 1883, Buckner, George S., Ox 113:107-113, 1988
  • The First Revenue Issues of 1870 and 1883, Mena, Hector, Ox 113:107-113, 1988
  • The First Revenue Issue: New Data on Quantities Printed, Mena, Hector, Ox 114:15, 1989
  • Bradbury, Wilkinson & Co Letter 10/26/1945, Palmer, Derek, CAN 34:145, 1989

1881

  • The Missing Link (9b), Cohen, Alex, Ox 69-100-2, 1977
  • Groping in the Dark (9b), Cohen, Alex, Ox 70:12-13, 1978
  • Is Scott No. 12 a Non-Emis?, Mena, Hector, Ox 108:71-72, 1987
  • Surcharges on the First Issue, Mena, Hector, RFC 69:1, 1985
  • The Surcharges on the First Issue, Saenz, Carlos, RFC 25:3-10, 1981
  • Surcharges on the First Issue Part I, Saenz, Carlos, RFC 67:2-6, 1985
  • Surcharges on the First Issue Part II, Saenz, Carlos, RFC 68:2-6, 1985
  • The 1881-2 Overprints, Part I, Sauber, J.W., Ox 100:98-120, 1985
  • The 1881-2 Overprints, Part II, Sauber, J.W., Ox 102:6-27, 1986
  • Die Echten Und Gefaelschten Ueberdrucke Von 1881-82, Sauber, J.W., Sammler Verein LA
  • The Mysterious "2 Cts" Error- Sc 9b, Sauber, J.W., Ox 114:11-15, 1989
  • The Large Numeral Overprinted Issue of 1881/82, Saundry, Richard, CAN 33:124-126, 1988
  • The Find of the Century (Sc 8 Sheet), Ox 57:107-8

1882

  • Another Forgery of Sc 14, Cohen, Alex, Ox 66:157, 67:36, 1977
  • New Forgeries, Cohen, Alex, Ox 71:36:7, 1978
  • UPU Counterfeit, Fossum, Earl, Ox 54:15, 1974
  • Identifiying Scott No 14, Lyons, William, Ox 59:37-8, 1975
  • The UPU Surcharges on the First Issue, Mena, Hector, LAPost 856, 1986
  • A Block of the 5 Cts UPU, O'Neill, Fred, RFC 24:5, 1981
  • First Issue Surcharges, Saenz, Carlos, EraOro 89-97, 1984
  • Additional Forgery on the Sc 15, Ox 60:76-7, 1975

    1883

  • Official Overprint Varieties, Cohen, Alex, Ox 67:46, 1977
  • The First Revenue Issues of 1870 and 1883, Mena, Hector, Ox 113:107-113, 1988
  • Official Mail Postal History (Abstract), O'Neill, Fred, Ox 99:54, 1985
  • Postal Use and Cancellations on the 1883-7 Revenue Stamps, Saenz, Carlos, RFC 23:2-7, 1981
  • The 1883 Issue, Saenz, Carlos, EraOro 109-129, 1984
  • The 1883-88 Revenue Stamps and its Postal Use, Saenz, Carlos, EraOro 127-134, 1984
  • Illustrations of Blocks, CRF 90:21-22, 1979

    1884

  • A Block of the 1884 2 cts Revenue Stamp, O'Neill, Fred, RFC 38:5, 1983
  • Die and Plate Proofs of 1884-88 Revenue Stamps, O'Neill, Fred, RFC 47:3-5, 1984
  • A 1884 Revenue Guanacaste Revenue Pair Postally Used in 1888, O'Neill, Fred, RFC 49:3, 1984

    1885

  • Double Guanacaste Overprint Type I & III on Plates III & IV, Alvarez, Ricardo, Panor 1:8-9, 1982
  • Type G-3 in Guanacaste Overprints, Bialikamien, Enrique, RFC 100:3-4, 1989
  • The G(n)anacaste Error, Mena, Hector, Ox 116:78-79, 1989
  • More About G(n)anacaste, Mena, Hector, Ox 117:117-118, 1989
  • The G(n)anacaste Error, O'Neill, Fred, RFC 28:6-7, 1982
  • Minor Varieties in Guanacaste Plate G-1, Saenz, Carlos, RFC 63:3-6, 1985

    1886

  • Official Stamps Types 2 and 3, O'Neill, Fred, RFC 33:3-6, 1983
  • The Rarest CR Cover (O5 & O17), O'Neill, Fred, RFC 34:1-2, 1983
  • The Official Stamps of 1886 (Abstract), O'Neill, Fred, Ox 114:17, 1989
  • Postal Stationery Cover: 10 cts of 1886, O'Neill, Fred, RFC 76:5-6, 1986

    1887

  • The Soto Issue of 1887, Saenz, Carlos, EraOro 137-147, 1984

    1888

  • Constant Varieties of Overprint Type G-9, O'Neill, Fred, RFC 29:3-5, 1982
  • A Forgery of the 1888 Proportional Revenue Stamp, O'Neill, Fred, RFC 34:3, 1983
  • Constant Varieties of Type G-9 Guanacaste Overprint (Abstract), O'Neill, Fred, Ox 116:84, 1989

    1889

  • Notes on Overprints 1889, Albrecht, JRM, CRFil 85:35, 1974
  • The "Inutilizado" Cancel on the Soto Issue, Angevine, David, Ox 117:114, 1989
  • Perforations of the 1889 Soto Issue of CR, Angevine, David, AmPhil 102:531-533, 1988
  • The Frustration of the Waterlow Perforations, Cohen, Alex, Ox 61:101, 1975
  • Type G-13 Guanacaste Overprint, O'Neill, Fred, RFC 05:2-4, 1979
  • Fined 1889 Soto Cover, O'Neill, Fred, RFC 35:1, 1983
  • Waterlow File Copies of the Soto Issue (Abstract), O'Neill, Fred, Ox 124:80-81, 1991
  • Double Transfers on the 20 cts Soto Issue, O'Neill, Fred, RFC 57:5-7, 1984
  • Double Transfer on the 50 cts Soto Issue, O'Neill, Fred, RFC 58:3, 1984
  • File Sheets of the Soto Issue, O'Neill, Fred, RFC 65:2-6, 1985
  • The Soto Portrait Issue of 1889, Quigley, James, Ox 64:91-2, 65:122-4, 76
  • The Soto Portrait Issue of 1889, Quigley, James, Ox 66:164-8, 1977
  • The Soto Portrait Issue of 1889, Quigley, James, Ox 67:37-46, 1977
  • Soto Covers, Quigley, James, Ox 69:103-9, 1977
  • The 1889 Overprints, Saenz, Carlos, EraOro 135-136, 1984
  • The Soto Issue of 1889, Saenz, Carlos, EraOro 148-169, 1964
  • The Soto Issue: A Further Response, Ox 68:74-5, 1979
  • Illustrations of Sheet, CRFil 90:22, 1979
  • Cover with "Alvo" Marking and 2 cts Postage, Ox 116:80, 1989

    1890

  • Illustration of Guanacaste 66 (Pair) on Cover, Alvarez, Ricardo, Panor 1:1, 1982
  • Double Overprint: Illustration G-60, Alvarez, Ricardo, Panor 5:1, 1982
  • Discovery of Two Guanacaste Sheets 64 & 65 (Abstract), Alvarez, Ricardo, Ox 116:84, 1989
  • File Sheets of Guanacaste Sc 64 and 65, Alvarez, Ricardo, RFC 64:3-5, 1985
  • Guanacaste Cover with G-13, O'Neil, Fred, RFC 83:2, 1987
  • Forgeries of Type G-13, O'Neill, Fred, RFC 01:2, 1979
  • Guanacaste Overprint Type G-13 (Abstract), O'Neill, Fred, Ox 96:73, 1984
  • Guanacaste Cover with G-13, O'Neill, Fred, RFC 83:2, 1987
  • Varieties of Guanacaste Overprints G56-59, Saenz, Carlos, RFC 64:1-2, 1985

    1891

  • Revenue Stamps of 1891 and Their Postal Use, O'Neill, Fred, RFC 32:3-7, 1983

    1892

    • Waterlow Perforations: CR 1892 Coat of Arms Issue, Angevine, David, AmPhil 106:59-61, 1992

    • "Telegrafos" Cancellation Counterfeits, Fossum, Earl, Ox 54:16, 1974
    • Waterlow Specimens Stamps, Frigstad, Roger, Ox 66:159-60, 1977
    • Inverted Waterlow Specimen Overprint on Sc 39, Jimenez, Salvador, RFC 19:3, 1981
    • A Study of the Coat of Arms Perforations, McCarty, George, CRFil 95:4, 1983
    • A Strip of Sc 37a, O'Neill, Fred, RFC 38:4, 1983
    • The 1892 Coat of Arms Issue, Saenz, Carlos, EraOro 171-224, 1984
    • A Cover of 1892, RFC 07:2, 1980
    • Cover to India with 7 Stamps, Ox 59:48:1975

    1901

    • The Rarest CR Stamp, Alvarez, Ricardo, Ox 66:170-71, 1977
    • Essays 1901, Alvarez, Ricardo, CRFil 90:15-17, 1978
    • The Rarest CR Stamp, Alvarez, Ricardo, Panor 4:1, 8, 1982
    • A Study of the 1901-3 Issue, Alvarez, Ricardo, AFCR Monograph, 1991
    • Official Mail of 1905, Amrhein, Manfred, RFC 87:3-6, 1988
    • New Findings in the 1901 Issue, Castro, Alvaro, RFC 100:5-12, 1989
    • Findings in the 1901-3 Issue, Castro, Alvaro, CRFil 97:13-19, 1985
    • The Frustration of the Waterlow Perforations, Cohen, Alex, Ox 61:101, 1975
    • Engraver's Marks on the 5 cts of 1901, O'Neill, Fred, RFC 12:2-4, 1980
    • Engraver Marks on the 5 cts of 1901 (Abstract), O'Neill, Fred, Ox 97:97, 1984
    • Fiscal Use of the 1901 Issue, O'Neill, Fred, RFC 55:1, 1984
    • Postal Use of the 1901 20 cts Stamp, O'Neill, Fred, RFC 56:4-7, 1984
    • Imperforated Proofs of the 1901 Issue, O'Neill, Fred, RFC 70:1-2, 1985
    • Perforation Guides on 1901 Stamps, O'Neill, Fred, RFC 126:2-3, 1991
    • Two Plates Used for the 5 cts 1901 Issue, O'Neill, Fred, RFC 127:3, 1991
    • Imperforated 1901 5 cts, O'Neill, Fred, RFC 28:5, 1982
    • Varieties on the Classics, Reuben, William, CRFil 88:25-8, 1976
    • An Essay Using the 1901 "1 Ct", Saenz, Carlos, RFC 30:3-4, 1982
    • Notes on the 1901-3 Issue, Saenz, Carlos, RFC 31:1-8, 1982
    • The 1901-03 Issue, Saenz, Carlos, EraOro 225-247, 1984
    • A Cover with 1901 Stamps, RFC 26:5, 1982
    • Note Concerning "Ultramar" Overprint, Ox 60:80, 61:108, 1975
    • Additional Information on "Ultramar" Overprint, Ox 64:96, 1976
    • Illustrations, Ox 68:82, 1977
    • Illustration of Sc 51- 1 Colon on Cover, RFC 142:5, 1992
    • Illustration of Sc 47 on Cover with Unusual Cancellation, RFC 143:6, 1992

    1903

    • Anatomy of a Registered Cover, Amrhein, Manfred, RFC 86:2-3, 1988
    • Double Transfer on the Frame Plate of Sc 56, Barie, Michael, Ox 128:71-73, 1992
    • Two Officials with Double Center, Cohen, Alex, Ox 59:63, 1975
    • Perforation Guides of 1903 Issue, O'Neill, Fred, RFC 127:1-2, 1991
    • Varieties on the Classics, Reuben, William, CRFil 88:25-8, 1976
    • Specimen Overprint on Postage Dues J1-8, Ox 64:96, 1976
    • Illustrations, Ox 68:82, 1977

    1905

    • Counterfeits 1905 Surcharge, Fossum, Earl, Ox 54:16, 1974
    • Uncommon Use of 1905 Overprint "Un Centimo", O'Neill, Fred, RFC 49:1-2, 1984

    1907

    • 1907 Imperforated Errors and 1911 Overprints, Alvarez, Ricardo, AFCR Bol 4:1-5, 1980
    • Postal Rates in 1907, Alvarez, Ricardo, AFCR Bol 5:1-3. 1980
    • The 1907 Issue, Cohen, Alex, Ox 70:16-18, 1978
    • The 1907 Issue Target Cancel, Cohen, Alex, Ox 79:51, 1980
    • The 1907 Issue and Overprints (general comments), Jimenez, Salvador, CRFil 86:29-30, 1975
    • Postal Use of the 1907 Imperforates, Mena, Hector, RFC 71:2-3, 1985
    • Postal Use of the 1907 Imperforates, O'Neill, Fred, RFC 40:1-3, 1983
    • Some Notes on the 1907 Issue, Quigley, James, Ox 70:14-5, 71:35-6,1978
    • The 1907 Issue and Gibbons, Saenz, Carlos, RFC 121:5, 1991
    • Illustrations, Ox 66:171, 1977
    • Illustrations of Inverted Centers, Ox 72:76, 1978

    1908

    • Plate Varieties 1908 Officials Overprints, O'Neill, Fred, RFC 115:4-5, 1990
    • Illustrations of Major Varieties, Ox 66:171, 1977
    • Double Center in the 4 cts Official, Ox 59:63, 1974

    1910

    • The Issue of 1910, Fossum, Earl J., Ox 105:125-130, 1986
    • A Variety of Sc 73 (10 cts), O'Neill, Fred, RFC 38:11, 1983
    • Constant Variety on the 1910 4 cts Stamp, O'Neill, Fred, RFC 61:6, 1985
    • Perforated Cancellations on 1910 Telegraph Stamps, Saenz, Carlos, RFC 24:3-4, 1981

    1911

    • 1907 Imperforated Errors and 1911 Overprints, Alvarez, Ricardo, AFCR Bol 4:1-5, 1980 P>The Overprint "Correos-2 Centimos", Alvarez, Ricardo, RFC 78:2-6, 1986
    • A Variety of the 1911 4 cts Overprint, Chernoff, Neil, Ox 120:90-91, 1990
    • The Third Plate of 5 cts Overprint (Sc 82), Echeverri, Hernan, RFC 42:2-3, 1983
    • A Grid to Detect 1911 Dos Centimos Forgeries, Edwards, Hal, Ox 100:124-125, 1985
    • The Scott Catalogue Was Right: 99a Does Exist, Mena, Hector, Ox 106:18-19, 1987
    • 1911 5 cts Overprint (Sc 82): An Unrecognized Variety, Mena, Hector, Ox 117:107-109, 1989
    • The Overprint "Correos-2 Centimos", Mena, Hector, RFC 77:2-6, 1986
    • Inverted "Correos" in the 10 Col of 1911, Mena, Hector, RFC 77:6, 1986
    • A Cover with a Variety of Sc 80, O'Neill, Fred, RFC 04:2, 1979
    • Bar Cancel on Saenz 211b, O'Neill, Fred, RFC 19:6-7, 1981
    • A Cover with the 1911 "Dos Centimos" Overprints, O'Neill, Fred, RFC 25:2, 1981
    • The "Roman Numerals" on Cover (82c), O'Neill, Fred, RFC 33:1, 1983
    • A Cover with a Variety of Sc 80, O'Neill, Fred, RFC 04:2, 1979
    • A Cover Showing the 1911 Surcharges, O'Neill, Fred, RFC 36:1, 1983
    • 1911 Overprint "Correos-2 Centimos" Varieties and Errors, O'Neill, Fred, RFC 48:1-11, 1984
    • Block of 16 of Sc 94, Saenz, Carlos, RFC 66:3-4, 1985
    • Illustrations, CRFil 88:25-8, 1976
    • Note on Identifying Forgeries, Ox 60:77, 1975
    • Warning on Forgeries, Ox 69:114, 1977
    • Illustration of a Double Surcharge in Block (Saenz 227i), RFC 42:2, 1983
    • Illustration of Sc 94 in a Large Block, Panor 2:1, 1982
    • Illustration of Tete Beche (Saenz 216f), RFC 42:2, 1983
    • More on Henry Schmidt, Ox 122:12-13, 1991

    1914

    • Interesting Postal Stationery Card, Saenz, Carlos, RFC 76:4, 1986

    1917

    • Additional Remarks on the 1917-20 Official Forgeries, Cohen, Alex, Ox 60:78-9, 1975
    • Additional Comments on 1917 Official Forgeries, Fossum, Earl, Ox 59:41, 1975
    • Forgeries of the 1917-20 Officials, Saenz, Carlos, Ox 59:40-2, 1975

    1920

    • The 15 cts Official Surcharge of 1920, O'Neill, Fred, RFC 42:4-6, 1983

    1921

    • Bolivar Issue Proofs, Castro, Alvaro, RFC 87:2, 1988
    • The 1921 Independence Centenary Issue, Fossum, Earl, Ox 61:110-6, 64:87, 1975
    • Proofs of Bolivar Issue, Mena, Hector, RFC 85:6, 1987
    • The Coffee Centenary Issue (Sc 103), O'Neill, Fred, RFC 09:3-10, 1980
    • Inverted Center: 1921 Independence Issue, O'Neill, Fred, RFC 14:5-6, 1980
    • Varieties on the 3 cts 1921 Independence Issue, O'Neill, Fred, RFC 19:2, 1981
    • The Coffee Centenary Issue (Abstract), O'Neill, Fred, Ox 108:77, 1987
    • New Aspects of the 1921 Bolivar Issue, O'Neill, Fred, RFC 53:1, 1984
    • Coffee Overprints and its Forgeries, O'Neill, Fred, RFC 140:3, 141:2, 1992
    • The 1921 Independence Centenary Issue, Saenz, Carlos, Ox 96:66-72, 1984
    • 1921 Independence Centenary: Imprenta Minerva Essays, Sauber, J.W., Ox 108:76-76, 1987

    1922

    • Forgeries 1922 Issues, Fossum, Earl, Ox 59:16-7, 1974
    • The 1922 Red Cross Overprint, O'Neill, Fred, RFC 54:4-7, 1984
    • Double Overprint on the 10 cts Coffee Propaganda Issue, O'Neill, Fred, RFC 114:6, 1990
    • Varieties of Sc 73a, Palacino, Guido, FilJov 4:14, 1983
    • The "Correos 1922" Overprint, Sauber, J.W., Ox 105:131-132, 1986
    • The "Correos 1922" Overprint: Additional Notes, Sauber, J.W., Ox 106:16-17, 1987

    1923

  • Proofs of 1923 Postal Stationary Envelopes, Alvarez, Ricardo, RFC 86:4-5, 1988
  • Proofs of 1923 Postal Stationery Envelopes, Amrhein, Manfred, RFC 85:4-5, 1987
  • The Jesus Jimenez Issue, Jimenez, Salvador, Ox 56:81-2, 1974
  • The Jesus Jimenez Issue, Jimenez, Salvador, CRFil 85:29-30, 1974
  • The Jesus Jimenez Issue (Abstract), Jimenez, Salvador, Ox 98:8, 1985
  • Postal Cards of 1923, McCarty, George, CRFil 95:1, 1983
  • Proof of the 1923 Postal Card, O'Neill, Fred, RFC 07:3, 1980
  • Newspaper Wrapper of 1923, O'Neill, Fred, RFC 24:6-7, 1981
  • Forgeries on Inverted Overprints 1923 Official Issue, O'Neill, Fred, RFC 63:6, 1985
  • Double Perforation on the 1923 Official Stamps, O'Neill, Fred, RFC 82:4, 1987
  • Photograph for Stamp Sc 118, O'Neill, Fred, RFC 138:6, 1992
  • Comments on the Circular Coffee Overprints, Reuben, William, CRFil 90:5-7, 1978
  • The "Compre Ud. Cafe de Costa Rica" Overprint (Abstract), Reuben, William, Ox 99:53, 1985
  • The 2 cts Definitive Stamp of 1923, Saundry, Richard, CAN 37:178-179, 1989
  • Mirror Image on the Back of the 20 cts Official (O68), RFC 14:3, 1980

    1924

  • 1924 Olympic Games Perforation Varieties, RFC 3:7, 1979

    1925

  • Counterfeits 1925 Surcharges, Fossum, Earl, Ox 54:17-9, 1974

    1926

  • The Regular Issue of 1926, O'Neill, Fred, RFC 18:3-6, 1980
  • The 1926 Official Issue, O'Neill, Fred, RFC 53:5-7, 1984
  • Shifted Perforation on 1926 10 cts, O'Neill, Fred, RFC 116:3, 1990
  • Varieties of C1, Palacino, Guido, FilJov 1:5, 1983

    1927

  • 1927 Telegraph Stamps and 1929 Overprints, O'Neill, Fred, RFC 62:2, 1985
  • The Inverted Surcharge of 1928, Alvarez, Ricardo, RFC 104:3-5, 1989
  • The Lindbergh First Day Covers, Mena, Hector, Ox 120:89-90, 1990
  • Inverted Surcharge on Sc 148, Mena, Hector, RFC 94:5, 1988
  • The 5 cts Surcharge of 1928, O'Neill, Fred, RFC 22:2-4, 1981
  • The 5 cts 1928 Surcharge Sc 148 (Abstract), O'Neill, Fred, Ox 116:83, 1989
  • The Lindbergh Overprint of 1928, O'Neill, Fred, RFC 72:2-6, 1986

  • The Lindbergh Overprint, Watchorn, Hugh, LAPost 258
  • Those Lindbergh First Days, Ox 122:14, 1991

    1929

    • The 13 Centimos Surcharge of 1929, Eisenstein, Harry, Ox 97:103-107, 1984
    • The 1929 Surcharges, Jimenez, Salvador, RFC 65:6, 1985
    • 1927 Telegraphic Stamps and 1929 Overprints, O'Neill, Fred, RFC 62:2, 1985
    • The "Correos 5 Centimos" Surcharge of 1929, Reuben, William, CRFil 86:23-8, 1975
    • Sc 150 Forgeries on Cover, Ox 98:18, 1985
    1930
    • Constant Varieties of the 5 cts Plate (Sc C3), O'Neill, Fred, RFC 37:5-8, 1983
    • A Displaced Surcharge on Sc 10, O'Neill, Fred, RFC 42:6, 1983
    • Variety of the 1930 50 cts Revenue Stamp, O'Neill, Fred, RFC 46:7, 1983
    • 1930 Airmail Surcharge Variety (Smoker's Pipe), O'Neill, Fred, RFC 02:2, 1979
    • The Airmail Surcharges of 1930, Palacino, Guido, FilJov 4:5-9, 1983
    • The Probably First Day of Issue of the 5 cts stamp of 1930, Saundry, Richard, CAN 36:164-165, 1989
    • Unreported Variety or Fake? (C6), Ox 93:108-9, 1983
    • Inverted C6, Ox 94:10, 1984
    • John Ross Tips on C11-13, Ox 105:122, 1986
    • John Ross Likes C11-13, Ox 106:7, 1987
    • That First Flight ENTA Cover Wasn't, Ox 122:12, 1991

    1931

    • The Airmail Provisionals of 1931 Revisited, Bailey, Paulsen, Ox 94:12, 1984
    • The 1931-2 Provisional Air Mail Issue, Cohen, Alex, Ox 62:11, 1976
    • The Airmail Provisionals of 1931 Revisited, Cohen, Alex, Ox 94:14, 1984
    • More About the Provisional Airmail Issue (1931-2), O'Neill, Fred, RFC 01:5, 1979
    • The Airmail Provisionals of 1931 Revisited, O'Neill, Fred, Ox 94:15, 1984

    1932

    • Counterfeits C14, Fossum, Earl, Ox 54:19-20, 1974
    • The "Wings" Issue, O'Neill, Fred, RFC 11:2-16, 1980
    • The 1932 Overprint on Telegraph Stamp (Abstract), O'Neill, Fred, Ox 102:30, 1986
    • The Newspaper Wrapper of 1923 (Abstract), O'Neill, Fred, Ox 114:16, 1989
    • Constant Plate Varieties on Sc C3, O'Neill, Fred, Ox 116:73-77, 1989
    • The "Wings" Issue, Palacino, Guido, FilJov 3:5-7, 1983

    1933

    • Cover Showing Sc C3, Ox 117:116, 1989

    1934

  • A Rare Block of C20, Mena, Hector, Ox 129:103-104, 1992
  • Overprint "Defensa Economica" on 1934 Airmail Issue, O'Neill, Fred, RFC 55:2-5, 1984
  • Airmails Perforated by Error for Official Use, O'Neill, Fred, RFC 62:5-6, 1985

    1935

  • Theft of the 1935 Airmail Overprints, O'Neill, Fred, CRFil 91:11-5, 1979
  • FDC of the 1935 Virgen of the Angels Issue, RFC 21:6, 1981

    1936

    • The Coco Island Official Issue, O'Neill, Fred, RFC 10:3-6, 1980
    • The Official Coco Island Stamps (Abstract), O'Neill, Fred, Ox 97:97, 1984
    • Coco Island Issue of 1936, Saenz, Carlos, RFC 136:3-6, 1992

    1937

    • The 1937 Official Issue, O'Neill, Fred, RFC 52:3-9, 1984

    • FDC II National Philatelic Exhibition, O'Neill, Fred, RFC 105:5-6, 1989
    • Postal Use of the 1937 Souvenir Sheet, O'Neill, Fred, RFC 117:2-6, 1990

    1940

    • Non-Emis Panamerican Child Congress and Health Day Issues, Alvarez, Ricardo, CRFil 85:25-27, 1974
    • The Panamerican Health Issue (Abstract), Alvarez, Ricardo, Ox 98:8, 1985
    • Minor Varieties of Pan-American Health Day Issue, Jimenez, Salvador, Ox 65:125, 1976
    • The Error DJA in the Panamerican Health Day Issue, Mena, Hector, RFC 91:4, 1988
    • Sc C46-54 Illustration, Ox 109:113, 1987
    • The DJA, Samples and Mr. Bendon, Alvarez, Ricardo, RFC 95:2-7, 1988

    1941

    • The "Advance Notice" and Special Cancel for 1941 Soccer Issues, Edwards, Hal, Ox 118:17-18, 1990
    • A Variety of the Regular 1941 Soccer Issue (Sc 201-8), Mena, Hector, Ox 118:15-16, 1990
    • "Rainy" Variety of the 1941 Soccer Issue, Mena, Hector, RFC 99:3, 1989
    • The Rained Variety of the 1941 Soccer Issue, O'Neill, Fred, RFC 91:5, 1988
    • Surcharges of the 1936 Cocos Island Issue, Saenz, Carlos, RFC 139:3-4, 1992
    • Design Shift in Sc 203, Ox 94:9, 1984
    • Special Event Cover for the 1941 Soccer Issue, Ox 121:123, 1990
    • Study of Broken Diamonds Requested, Ox 124:72, 1991

    1942

    • The 1942 Continental Defense Issue, O'Neill, Fred, RFC 139:5, 1992
    • Continental Defense Issue Varieties, Palacino, Guido, FilJov 3:10, 1983
    • Illustration of a Historical Curiosity (Continental Defense Issue), RFC 33:2, 1983

    1943

    • Varieties of Sc 228, Masis, Mario, FilJov 4:15, 1983
    • Revenue Use of Sc 225, O'Neill, Fred, RFC 22:5, 1981

    1944

  • The 1944 Issue, Alvarez, Ricardo, Panor 2:14-16, 1982
  • The 1944 Airmail Surcharge (Abstract), Alvarez, Ricardo, Ox 96:73, 1984
  • Essays on Heredia Electrification Revenue Stamps, Bonilla, Alvaro, RFC 54:1, 1984
  • Boundary Dispute Overprints Varieties, Castro, Alvaro, CRFil 95:1, 1983
  • C103 Varieties, O'Neill, Fred, RFC 07:6, 1980
  • Damaged Overprint on 1944 Presidential Meeting Issue, O'Neill, Fred, RFC 108:6, 1989
  • Shifted Overprints in 1944 Electoral Revenue Stamps, O'Neill, Fred, RFC 117:1, 1990
  • Boundary Treaty Issue Varieties, Palacino, Guido, FilJov 5:4-8, 1983

    1945

    • Inverted "1945" on the 5 cts Airmail Issue, Alvarez, Ricardo, RFC 105:1-3, 1989
    • The 1945 "Impuesto Cruz Roja" Surcharge, O'Neill, Fred, RFC 26:2-4, 1982
    • Two Plates of the 1945 Airmail Overprints on the 40 cts Value, O'Neill, Fred, RFC 27:3-4, 1982
    • A Variety of the 1945 Revenue Stamp, O'Neill, Fred, RFC 33:7, 1983
    • The 1945 "Impuesto Cruz Roja" Surcharge (Abstract), O'Neill, Fred, Ox 114:17, 1989
    • Inverted Overprint on the 5 cts 1945 Airmail Issue, O'Neill, Fred, RFC 94:5-6, 1988
    • Preliminary Study on the Semi-classical Issues, Reuben, William, CRFil 89:29-35, 1977
    • Major Varieties of the 1945 Overprint, Reuben, William, RFC 45:7-9, 1983
    • Souvenir Sheet of Sc 242, RFC 22:7, 1981

    1946

    • 1946 Overprint Varieties, Alvarez, Ricardo, RFC 124:2-5, 1991
    • Our Presidents Issues, McCarty, George, LAPost 918, 1987
    • San Juan de Dios Hospital Issue Proofs, McCarty, George, CRFil 98:12, 1986
    • Official Stamps with "Timbre Cheque 1946" Overprint, O'Neill, Fred, CRFil 88:31-2, 1976
    • Overprints Proofs of 1946 Revenue Stamps, O'Neill, Fred, RFC 36:4, 1983
    • Official Stamps Surcharged "Timbre Cheque 1946" (Abstract), O'Neill, Fred, Ox 99:54, 1985
    • A Variety of the 1946 15 cts Overprint, O'Neill, Fred, RFC 52:1, 1984
    • Hospital Puerto Cortes Revenue Stamp, O'Neill, Fred, RFC 73:1, 1986
    • Non Constant Varieties on the Mauro Fernandez Issue, O'Neill, Fred, RFC 104:6, 1989
    • 1946 Surcharge Error, Saenz, Carlos, RFC 122:2-4, 1991

    1947

    • "Canceled to Order" CR Muestra Stamps of 1947-8, Hart, Albert, Ox 125:106-108, 1991
    • Our Presidents (1947 Issue), McCarty, George, CRFil 98:14-15, 1986
    • President Issue of 1947, Mena, Hector, RFC 85:2-3, 1987
    • The Inverted Surcharge of 1947, O'Neill, Fred, RFC 07:5:6, 1980
    • The "Correos 1947" Overprint, O'Neill, Fred, RFC 13:4-7, 1980
    • The Inverted Airmail Surcharges of 1947 (Abstract), O'Neill, Fred, Ox 97:97, 1984
    • The 1947 Overprint (Abstract), O'Neill, Fred, Ox 104:99, 1986
    • Columbus Fleet Postal Stationery Envelopes, O'Neill, Fred, RFC 103:3-6, 1989

    1948

    • The 1948 Revenue Stamps ABNCo. Die Proofs, O'Neill, Fred, Ox 100:120-122, 1985

    1949

    • Guanacaste Anniversary Issue Varieties, Donato, Ezio, RFC 51:5, 1984
    • Guanacaste Anniversary Issue Varieties, Jimenez, Salvador, RFC 51:5, 1984
    • Varieties of Sc C183, Masis, Mario, FilJov 2:10, 1983
    • Unreported Overprint Proof 1949 Revenue Stamps, O'Neill, Fred, RFC 47:6, 1984

    1950

    • Varieties of Sc C198, Masis, Mario, FilJov 1:6, 1983

    1952

    • Errors on 1952 Revenue Stamps, O'Neill, Fred, RFC 28:4, 1982
    • Varieties and Errors of 1952 Revenue Stamps, O'Neill, Fred, RFC 86:6, 1988
    • Double Surcharge in 1952 Revenue Stamps, O'Neill, Fred, RFC 110:1, 1990
    • Proofs of the Queen Isabella Issue, Palacino, Guido, FilJov 5:15-16, 1983
    • Mirror Image on Back of 5 cts, RFC 24:4, 1981

    1953

    • A Gradual Disappearance of the Bottom Line (Sc 257), Barton, Dale, Ox 84:85, 1981
    • A Gradual Disappearance of the Bottom Line (Sc 257), Edwards, Hal, Ox 84:85, 1981
    • The National Industries Issue: The "Other" Differences, Edwards, Hal, Ox 96:74-79, 1984
    • The National Industries Issue: The "Other" Differences, McGhee, Henry, Ox 96:74-79, 1984
    • Displaced 1953 Surcharges, O'Neill, Fred, RFC 09:2, 1980

    1954

    • An Unreported Variety (1954 Industries), Barton, Dale, Ox 73:105-6, 1978
    • Major Varieties of Industry Issue, MacPeek, Donald, Ox 56:79:80,
    • Shifted Perforations on the 15 cts Industries Issue, O'Neill, Fred, RFC 104:5, 1989

    1955

    • Displaced 5 cts on Sc 258, Ox 87:49, 1982

    1956

  • Varieties and Errors of 1956 Revenue Stamps, O'Neill, Fred, RFC 24:2, 1981
  • Variety on the 5 cts 1956 Overprint, O'Neill, Fred, RFC 54:2, 1984
  • 1956 Revenue Stamp with Double Overprint, O'Neill, Fred, RFC 75:6, 1986
  • Shifted Overprints on the 2 cts 1956 Revenue Stamp, O'Neill, Fred, RFC 81:6, 1987
  • Varieties of the 10 cts 1956 Industries Issue, O'Neill, Fred, RFC 102:1, 1989

    1960

    • The Imperforated Rome Olympics, Alvarez, Ricardo, CRFil 86:11-18, 1975
    • The Imperforated Rome Olympics, Alvarez, Ricardo, CRFil 88:35-40, 1976
    • TheImperforated Rome Olympics, Alvarez, Ricardo, Ox 66:161-63, 1976
    • The Imperforates of the Rome Olympics, Cohen, Alex, Ox 62:6-7, 1976
    • Revenue Stamps Overprinted "Muestra", O'Neill, Fred, RFC 16a:9, 1980
    • Imperforated 1960 Christmas Tax Stamp, O'Neill, Fred, RFC 45:5-6, 1983
    • Centenary of Mora and Canas Execution Covers, O'Neill, Fred, RFC 128:3-6, 1991
    • More About Mora and Canas Covers, O'Neill, Fred, RFC 132:2-3, 1991
    • Imperforated 1960 Christmas Tax Stamp, O'Neill, Fred, RFC 45:5-6, 1983
    • Illustration Varieties OAS Issue, CRFil 91:24-5, 1979

    1962

    • Double Surcharge on 35 cts Industries Issue, O'Neill, Fred, RFC 118:1, 1990

    1963

    • The 1963 National Legislature Postal Stationery, O'Neill, Fred, RFC 97:2-3, 1989
    • Illustration of Variety Surcharge on Animals Issue, Panor 3:1, 1982

    1965

  • The San Blas Church in the Nicoya Parish, Drymiller, James J., Ox 106:14-16, 1987
  • Varieties of the 1965 Christmas Tax Stamp, Franco, Eugenio, RFC 53:3, 1984
  • 1965 Christmas Tax Stamp Varieties, Franco, Eugenio, RFC 53:3, 1984
  • A Color Error on C405, Mena, Hector, Ox 127:42-43, 1992
  • Fire Brigade Issue Varieties, RFC 22:6, 1981
  • Color Changes in Sc C412, Ox 94:9, 1984

    1967

    • A Reimpression of the 1967 Church Issue, Alvarez, Ricardo, RFC 82:2-3, 1987
    • The Three Printings of the ICE issue, Edwards, Hal, Ox 81:109-11, 1981
    • The Churches Issue Revisited, Edwards, Hal, Ox 84:89, 1981
    • Varieties of the ICE Issue, Masis, Mario, FilJov 3:11, 1983
    • Die Proofs of the 1967 Churches Issue, O'Neill, Fred, RFC 36:5-6, 1983
    • 1967 Central Bank Issue Perforation Varieties, O'Neill, Fred, RFC 53:4, 1984
    • Gutter Pairs Postal Tax Issue 1967, Ox 91:39, 93:109, 1983

    1968

    • The Overprint Commemorating the III CR Exhibition, Alvarez, Ricardo, CRFil 88:5-10, 1976
    • 1968 Olympic Games Issue Varieties, Diaz, Luis, CRFil 97:20-23, 1985

    1969

  • Varieties of Sc C492, Masis, Mario, FilJov 5:17, 1983 1970
    • A Plate Marking in 1970 Christmas Tax Stamp, O'Neill, Fred, RFC 49:4-5, 1984
    • Christmas Tax Stamps 1970 Variety, Ox 93:107, 1983
    • Plate scratches on 1970 Christmas Tax Stamps, Ox 94:10, 1984

    1971

    • Varieties in the 1971 Christmas Tax Stamps, Jimenez, Salvador, RFC 52:2, 1984
    • 1971 Christmas Tax Stamps Varieties, Jimenez, Salvador, RFC 52:2, 1984
    • Independence Commemorative Issue, CRFil 85:11, 1974

    1972

    • Another C555 Invert Surfaces, Edwards, Hal, Ox 79:43, 1980
    • Liberia Issue Perforation Varieties, O'Neill, Fred, RFC 96:6, 1988
    • Another Inverted Center of the 1972 Tourism Issue, Yudin, Richard, CAN 40:218, 1990
    • Christmas Tax Stamp 1972 Varieties, RFC 39:3, 1983

    1973

    • The Second Churches Issue, Alvarez, Ricardo, CRFil 85:37-40, 1974
    • A Catalogue Change 1973 Churches Issue, Cohen, Alex, Ox 90:72, 1983
    • Perforation Errors of the 55 cts 1973 Church Issue, O'Neill, Fred, RFC 122:1, 1991
    • Announcement of Circulation 1973 Churches

      Issue, CRFil 85:49, 1974
    • Announcement of Circulation 1973 Special Delivery Issue, CRFil 85:49, 1974
    • Announcement of Circulation 1973 Christmas Tax Stamps, CRFil 85:49, 1974
    • Announcement of Circulation 1973 Human Rights Issue, CRFil 85:50, 1974
    • Announcement of Circulation 1973 OAS Issue, CRFil 85:49, 1974

    1974

    • Color Shift on the 1 Col Olympic Games of 1974, Aviles, Fernado, RFC 115:2, 1990
    • Sheet Layout for the 1974 Christmas Postal Tax Stamps, Fossum, Earl, Ox 61:119, 1975
    • 1974 Christmas Tax Stamps, Jimenez, Salvador, CRFil 97:24, 1985
    • 1974 Christmas Tax Stamps Varieties, Jimenez, Salvador, CRFil 97:24, 1985
    • World Population Issue Varieties, O'Neill, Fred, CRFil 87:35, 1975
    • Population Year Issue Perforation Variety, O'Neill, Fred, RFC 47:5, 1984
    • Perforation Error on 20 cts Roberto Brenes Issue, O'Neill, Fred, RFC 59:1, 1984
    • Announcement of Circulation 1973 Symphony Issue, CRFil 85:50, 1974
    • Announcement of Circulation 1974 Overprint Issue, CRFil 85:50, 1974

    1975

    • Annexation of Nicoya Issue, Alvarez, Ricardo, CRFil 88:29, 1976

    • Double Impression of Red on Sc C634, Barie, Michael, Ox 120:88, 1990
    • Double print of 2 Col 1975 Amateur Radio Issue, Cohen, Alex, Ox 60:76, Ox 62:5, 1975
    • 1975 Orchids Issue Varieties, Edwards, Hal, Ox 67:49, 1977
    • Orchid 1975 Issue Varieties, Jimenez, Salvador, RFC 25:1, 1981
    • Amateur Radio Issue Varieties, Jimenez, Salvador, Ox 71:43, 1978
    • Varieties on 25 cts.Nicoya Issue (Sc C636), Jimenez, Salvador, RFC 56:2, 1984
    • Amateur Radio Clubs Issue Varieties, Lindo, Stanley, RFC 75:1, 1986
    • 1975 Orchid Issue Variety, McCarty, George, Ox 86:12-4, 1982
    • Orchid Issue Varieties, O'Neill, Fred, RFC 45:1, 1983
    • Radio Amateur Issue Varieties, O'Neill, Fred, CRFil 87:1975
    • Varieties and Errors on the 40 cts Woman's Year Issue, O'Neill, Fred, RFC 57:4, 1984
    • Color Shift on the Orchid Issue, O'Neill, Fred, RFC 61:1, 1985
    • Varieties of the 1.40 Col of the Orchid Issue, O'Neill, Fred, RFC 71:1, 1985
    • CR 75 Issue Varieties, O'Neill, Fred, RFC 73:6, 1986
    • Varieties and Errors on the 10 cts United Nations Issue, O'Neill, Fred, RFC 92:2-3, 1988
    • Incineration and Remainders, RFC 06:4, 1979
    • Note on Perforations 1975 Orchid Issue, Ox 60:77, 1975
    • Phil. Bull. No. 37: Orchids, issued 3/7/75, Ox 59:62-3, 1975
    • Phil. Bull. No. 38: Amateur Radio, issued 4/16/75, Ox 59:64, 1975
    • Phil. Bull. No. 39: Nicoya, issued 8/1/75, Ox 60:95, 1975
    • Phil. Bull. No. 40: Philatelic Ex., issued 8/14/75, Ox 60:96, 1975
    • Phil. Bull. No. 41: Women's Year, issued 10/9/75, Ox 61:134, 1975
    • Women's Year Issue Perforation Varieties, RFC 15:11, 1980
    • Phil. Bull. No. 42: UN Anniversary, issued 10/24/75, , Ox 61:135, 1975
    • UN Anniversary Issue Varieties, Ox 63:46, 1976
    • Phil. Bull. No. 43: Christmas Tradition, issued 6/17/75, Ox 61:136, 1975
    • Nicoya Annexation Issue Perforation Varieties, Ox 64:103, 1976
    • Nicoya Annexation Issue Perforation Varieties, RFC 05:5, 1979
    • 1975 Orchid Issue Varieties, Ox 64:93, 1976
    • Color Variation on Nicoya Issue (Sc C638), RFC 56:3, 1984

    1976

    • Imperforated Stamps of the 1976 Inmediate Delivery Issue, Bialikamien, Enrique, RFC 66:1. 1985
    • Editorial CR Issue Varieties, Diaz, Luis, CRFil 95:2, 1983
    • Varieties of Sc C677, Jimenez, Salvador, RFC 34:3, 1983
    • UPU Centenary Issue Varieties, O'Neill, Fred, RFC 06:2-3, 1979
    • Varieties on the 10 Col Alberto M. Brenes Issue, O'Neill, Fred, RFC 59:3, 1984
    • UNESCO Commemorative Cachet, O'Neill, Fred, RFC 113:1, 1990
    • Varieties UPU Centenary Issue, Saenz, Carlos, Ox 66:168-9, 1977
    • Phil. Bull. No. 44: Christmas Tax Stamps, issued 11/25/75, Ox 61:137, 1975
    • Phil. Bull. No. 45: 20-30 Clubs, issued 1/16/76, Ox 62:32, 1976
    • Phil. Bull. No. 46: AM Brenes, issued 3/1/76, Ox 62:33, 1976
    • AM Brenes Issue Perforation Varieties, RFC 05:5, 1979
    • Phil. Bull. No. 47: Publishing, issued 2/4/76, Ox 63:81, 1976
    • Phil. Bull. No. 48: Special Delivery, issued 5/17/76, Ox 63:82, 1976
    • 1976 Special Delivery Issue Perforation Varieties,Ox 64:115, 1976
    • Phil. Bull. No. 51: IX FIAF, issued 11/11/76, Ox 65:147, 1976
    • Phil. Bull. No. 52: General Audit Office, issued 11/22/76, Ox 65:148, 1976
    • Phil. Bull. No. 53: Christmas Tax Stamps, issued 11/24/76, Ox 65:149, 1976
    • Phil. Bull. No. 54: Pediatric Congress, issued 11/29/76, Ox 65:150, 1976
    • Phil. Bull. No. 55: LACSA, issued 12/1/76, Ox 65:151, 1976
    • Phil. Bull. No. 56: US Bicentennial, issued 12/24/76, Ox 66:173, 1977
    • UPU Centenary Issue Perforation Varieties, RFC 09:11, 1980
    • UPU Centenary Issue Perforation Varieties, RFC 16:3, 1980
    • UPU Centenary Issue Perforation Varieties, RFC 46:1, 1983
    • Mirror Image Audit Office Issue, RFC 18:6-7, 1980
    • Audit Office Issue Perforation Varieties, RFC 05:5, 1979
    • Alexander Bell Issue Varieties, RFC 05:5, 1979
    • A Note on Sc C670 Variety, Ox 118:11, 1990

    1977

    • Hispanic Culture Issue Varieties, Jimenez, Salvador, RFC 55:6, 1984
    • Rotary Issue Varieties and Errors, Jimenez, Salvador, RFC 57:2, 1984
    • Esparza Issue Varieties, Jimenez, Salvador, RFC 75:1, 1986
    • Phil. Bull. No. 57: Small Industry, issued 2/22/77, Ox 67:51, 1977
    • Phil. Bull. No. 58: Rotary, issued 5/5/77, Ox 67:52, 1977
    • Rotary Issue Perforation Varieties, RFC 01:4, 5:5, 1979
    • Phil. Bull. No. 59: Our Lady of the Angels, issued 6/6/77, Ox 68:85, 1977
    • Our Lady of the Angels Issue Perforation Varieties, RFC 15:11, 1980
    • Phil. Bull. No. 60: Founding of Esparza, issued 7/4/77, Ox 68:86, 1977
    • Founding of Esparza Issue Perforation Varieties, RFC 01:4, 1979
    • Phil. Bull. No. 61: CARE, issued 9/14/77, Ox 69:117, 1977
    • Phil. Bull. No. 62: Hispanic Culture Institute, issued 10/21/77, Ox 69:118, 1977
    • Phil. Bull. No. 63: Paintings, issued 11/9/77, Ox 69:119, 1977
    • Phil. Bull. No. 64: Health Ministry, issued 11/16/77, Ox 69:120, 1977
    • Phil. Bull. No. 65: Christmas Tax Stamp, issued 11/16/77, Ox 69:121, 1977

    1978

    • Phil. Bull. No. 66: COTAL, issued 3/21/78, Ox 71:50, 1978
    • Phil. Bull. No. 67: Literacy, issued 7/17/78, Ox 72:81, 1978
    • Phil. Bull. No. 68: San Martin, issued 8/7/78, Ox 72:82, 1978
    • Phil. Bull. No. 69: Geographical Institute, issued 8/28/78, Ox 72:83, 1978
    • Phil. Bull. No. 70: CSUCA, issued 9/18/78, Ox 72:84, 1978
    • Phil. Bull. No. 71: Argentina '78 Exhibition, issued 10/24/78, Ox 73:107, 1978
    • Phil. Bull. No. 72: First Pan Am Flight, issued 11/1/78, Ox 73:108, 1978
    • Phil. Bull. No. 73: Lindbergh's Visit, issued 11/1/78, Ox 73:109, 1978
    • Phil. Bull. No. 74: Carlos Maria Ulloa, issued 11/8/78, Ox 73:110, 1978
    • Phil. Bull. No. 75: Christmas Traditions, issued 11/13/78, Ox 73:111, 1978
    • Phil. Bull. No. 76: Overprints, issued 11/13/78, Ox 73:112, 1978
    • Phil. Bull. No. 77: Christmas Tax Stamps, issued 11/20/78, Ox 73:113, 1978
    • 1978 Christmas Tax Stamps Perforation Varieties, RFC 01:4, 1979
    • Phil. Bull. No. 78: Fernando de Oviedo, issued 11/20/78, Ox 73:114, 1978
    • Fernado de Oviedo Issue Varieties, RFC 13:13, 1980
    • Phil. Bull. No. 79: San Jose Cathedral, issued 12/6/78, Ox 73:115, 1978
    • Phil. Bull. No. 80: Postal Stationary, issued 12/11/78, Ox 73:116, 1978

    1979

    • 1979 Ex-Presidents Issue Perforation Varieties, O'Neill, Fred, RFC 27:5, 1982
    • Phil. Bull. No. 81: Coco Island, issued 4/30/79, Ox 75:52, 1979
    • Phil. Bull. No. 82: Postal Stationary, issued 4/23/79, Ox 75:53, 1979
    • Phil. Bull. No. 83: Marine Life Protection, issued 5/14/79, Ox 75:54, 1979
    • Phil. Bull. No. 84: Year of the Child, issued 5/24/79, Ox 75:55, 1979
    • Year of the Child Varieties, RFC 02:3, 9:11, 19:7,198
    • Year of the Child Varieties, Ox 92:74, 1893
    • Phil. Bull. No. 86: ICE, issued 6/28/79, Ox 76:87, 1979
    • Phil. Bull. No. 87: Sculpture Contest, issued 7/16/79, Ox 76:88, 1979
    • Phil. Bull. No. 88: Sir Rowland Hill, issued 7/16/79, Ox 76:89, 1979
    • Announcement of Circulation: Rowland Hill Issue, RFC 04:9, 1979
    • Phil. Bull. No. 89: Butterflies, issued 8/31/79, Ox 76:90, 1979
    • Phil. Bull. No. 90: Children's Village, issued 9/18/79, Ox 77:119, 1979
    • Phil. Bull. No. 91: Ex-presidents, issued 10/8/79, Ox 77:120, 1979
    • Announcement of Circulation: Ex-presidents Issue, RFC 07:4-5, 1980
    • 1979 Ex-presidents Varieties, AFCR Bol 7:5, 8:1O, 1980
    • 1979 Ex-presidents Varieties, Ox 92:74, 1983
    • Phil. Bull. No. 85: Special Delivery, issued 6/15/79, Ox 76:86, 1979
    • Special Delivery Varieties, RFC 02:3, 1979
    • Special Delivery Varieties, Ox 92:79, 1983
    • Phil. Bull. No. 92: Christmas Traditions, issued 11/16/79, Ox 77:121, 1979
    • Christmas Tradition Varieties, CRFil 94:2, 1983
    • Phil. Bull. No. 93: Christmas Tax Stamps, issued 11/19/79, Ox 77:122, 1979

    1980

    • Rembrandt in Our Stamps, Alvarez, Ricardo, AFCR Bol 2:1-4, 1980
    • CR National Anthem, Edwards, Hal, Ox 80:81, 1980
    • Phil. Bull. No. 94: Reforestation, issued 1/14/80, Ox 78:30, 1980
    • Reforestation Issue Perforation Varieties, RFC 07:4, 1980
    • Phil. Bull. No. 95: Medical Teaching, issued 2/7/80, Ox 78:31, 1980
    • Phil. Bull. No. 96: Rotary, issued 2/26/80, Ox 78:32, 1980
    • Rotary Issue Perforation Varieties, RFC 10:2, 1980
    • Phil. Bull. No. 97: Enviroment, issued 3/10/80, Ox 79:62, 1980
    • Phil. Bull. No. 98: Olympic Games, issued 4/16/80, Ox 79:63, 1980
    • Phil. Bull. No. 99: National Parks, issued 5/14/80, Ox 79:64, 1980
    • Phil. Bull. No. 100: National Anthem, issued 6/25/80, Ox 80:82, 1980
    • Announcement of Circulation, National Anthem Issue, AFCR Bol 7:4, 1980
    • Phil. Bull. No. 101: Ex-Presidents, issued 8/14/80, Ox 81:125, 1980
    • Phil. Bull. No. 102: 8th. Philatelic Exhibition, issued 9/11/80, Ox 81:126, 1980
    • Phil. Bull. No. 103: Agricultural Products, issued 9/24/80, Ox 81:127, 1980
    • Agricultural Products Issue Varieties, RFC 42:7, 1983
    • Phil. Bull. No. 104: Paintings, issued 10/22/80, Ox 81:128, 1980
    • Phil. Bull. No. 105: Christmas Traditions, issued 11/11/80, Ox 81:129, 1980
    • Christmas Traditions Issue Varieties, RFC 18:6, 1980
    • Phil. Bull. No. 106: Christmas Tax Stamps, issued 11/18/80, Ox 81:130, 1980
    • Phil. Bull. No. 107: Taxes, issued 12/11/80, Ox 82:29 1981,
    • Phil. Bull. No. 108: Special Delivery, issued 12/18/80, Ox 82:30, 1981
    • Phil. Bull. No. 109: Fauna, issued 12/23/80, Ox 82:31, 1981

    1981

    • Fauna Issue (perforation varieties), RFC 29:5, 1982
    • Phil. Bull. No. 110: Joaquin Garcia, issued 1/2/81, Ox 82:32, 1981
    • Phil. Bull. No. 111: Human Cornea Bank, issued 1/28/81, Ox 83:63, 1981
    • Phil. Bull. No. 112: CR University, issued 4/8/81, Ox 83:64, 1981
    • Phil. Bull. No. 113: von Stephan, issued 5/6/81, Ox 84:90, 1981
    • Phil. Bull. No. 114: World Telecommunications, issued 5/18/81, Ox 84:91, 1981
    • Phil. Bull. No. 115: Bishop Thiel, issued 6/8/81, Ox 84:92, 1981
    • Bishop Thiel Issue Perforation Varieties, RFC 39:3, 1983
    • Phil. Bull. No. 116: Alajuela Province, issued 6/26/81, Ox 84:93, 1981
    • Phil. Bull. No. 117: Popular Bank, issued 7/10/81, Ox 84:94, 1981
    • Phil. Bull. No. 118: National Archives, issued 8/24/81, Ox 85:120, 1981
    • Phil. Bull. No. 119: Year of the Handicapped, issued 9/9/81, Ox 85:121, 1981
    • Handicapped Issue: Referred to Committee, Ox 84:73, 1981
    • Handicapped Issue: Bill Dictates Use of Proceeds, Ox 85:112, 1981
    • Handicapped Issue: President Vetoes Use of Proceeds Bill, Ox 88:67-8, 1982
    • Phil. Bull. No. 120: World Food Day, issued 10/16/81, Ox 85:122, 1981
    • Phil. Bull. No. 121: Christmas Tax Stamps, issued 11/19/81, Ox 86:27, 1982
    • Phil. Bull. No. 122: Ex-Presidents, issued 12/7/81, Ox 86:28, 1982

    1982

    • Phil. Bull. No. 123: Bar Association, issued 3/15/82, Ox 87:58, 1982
    • Bar Associacion Issue, Bank Legalizes Issue, Ox 87:42, 1982
    • Phil. Bull. No. 124: CR Progresses, issued 5/5/82, Ox 87:59, 1982
    • CR Progresses Issue: Central Bank Verifies Issue, Ox 88:66, 1982
    • Phil. Bull. No. 126: Alajuela, issued 8/9/82, Ox 88:87, 1982
    • Phil. Bull. No. 127: Perez Zeledon Foundation, issued 8/30/32, Ox 88:88, 1982
    • Perez Zeledon Issue Delayed in Legislature, Ox 84:74, 1982
    • Perez Zeledon Issue Approved by Legislature, Ox 86:6-7, 1983
    • Phil. Bull. No. 128: Provisional Surcharges, issued 10/28/82, Ox 89:113, 1982
    • Phil. Bull. No. 129: IX CR Exhibition, issued 10/28/82, Ox 89:114, 1982
    • IX CR Exhibition Proofs of Overprints, CRFil 94:5, 1983
    • Phil. Bull. No. 130: Christmas Tax Stamps, issued 11/19/82, Ox 89:115, 1982
    • Phil. Bull. No. 131: Tuberculosis, issued 11/19/82, Ox 89:116, 1982
    • Phil. Bull. No. 132: Blood Donors, issued 11/25/82, Ox 89:117, 1982
    • Blood Donors Issue Varieties, CRFil 92:3, 93:2, 1983
    • Blood Donors Issue: A Missing Stamp, RFC 32:2, 1983
    • Blood Donors Issue: A Missing Stamp, Ox 89:102-3, 1982
    • Phil. Bull. No. 133: Postal Stationary, issued 12/10/82, Ox 90:26, 1983
    • Phil. Bull. No. 134: Migration Committee, issued 12/13/82, Ox 90:27, 1983
    • Phil. Bull. No. 135: Special Delivery, issued 12/20/82, Ox 90:28, 1983
    • Special Delivery Issue Varieties, CRFil 92:2, 1983
    • Proceeds of Alajuela Bicentenary Issue, Ox 84:73, 1981
    • Missing Color in C877, RFC 132:3, 1991

    1983

    • Perforation Errors in IX CR Exhibition Issue, Castro, Alvaro, CRFil 92:2, 1983
    • Artist Design of Sc 279, O'Neill, Fred, RFC 98:2-6, 1989
    • Pope Paul Issue Minor Varieties, O'Neill, Fred, RFC 137:6, 1992
    • 1983 Surcharge Issue Minor Varieties, O'Neill, Fred, RFC 141:6, 1992
    • Assisi Issue Minor Varieties, O'Neill, Fred, RFC 143:6, 1992
    • Phil. Bull. No. 136: St. Francis de Assisi, issued 1/3/83, Ox 90:29, 1983
    • Phil. Bull. No. 137: Pope John Paul, issued 3/1/83, Ox 90:30, 1983
    • Announcement of Circulation: Pope John Paul Issue, CRFil 92:1, 1983
    • Phil. Bull. No. 138: Aerogramme, issued 4/25/83, Ox 91:63, 1983
    • Phil. Bull. No. 139: Telecommunications, issued 5/17/83, Ox 92:95, 1983
    • Telecommunications Issue, CRFil 93:4, 1983
    • Telecommunications Issue, RFC 38:3, 1983
    • Phil. Bull. No. 140: Human Rights Congress, issued 5/30/83, Ox 91:62 1983
    • Announcement of Circulation: Human Rights Congress Issue, RFC 38:3, 1983
    • Phil. Bull. No. 141: UPU, issued 6/30/83, Ox 93:124, 1983
    • Announcement of Circulation: UPU Issue, CRFil 94:4, 1983
    • Phil. Bull. No. 142: French Alliance, issued 7/21/83, Ox 93:125, 1983
    • Announcement of Circulation: French Alliance Issue, CRFil 94:4, 1983
    • Phil. Bull. No. 143: Simon Bolivar, issued 7/22/83, Ox 93:126, 1983
    • Announcement of Circulation: St. Francis de Assisi Surcharges, RFC 44:1, 1983
    • Phil. Bull. No. 144: Christmas Postal Tax, issued 11/24/83, Ox 94:28, 1984
    • Phil. Bull. No. 145: Christmas Traditions, issued 12/5/83, Ox 94:29, 1984
    • Phil. Bull. No. 146: Fisheries Administration, issued 12/19/83, Ox 94:30, 1984
    • Overprints on St. Francis Issue, Ox 103:56, 1986

    1984

    • No Need for Sc 287, Malz, Leo, Ox 109:108-9, 1987
    • Perforation Errors on 50 cts Birds Issue, O'Neill, Fred, RFC 60:2, 1985
    • Olympic Paper Variety (Sc #304-309), Steen, Piet, LAPost 750, 1985
    • Phil. Bull. No. 147: Birds of CR, issued 1/9/84, Ox 94:31, 1984
    • Phil. Bull. No. 148: 1856 Campaign Heroes, issued 4/10/84, Ox 96:90, 1984
    • Phil. Bull. No. 149: CR Musicians, issued 5/30/84, Ox 96:91, 1984
    • Phil. Bull. No. 150: CR Indian Art, issued 6/27/84, Ox 97:125, 1984
    • Phil. Bull. No. 151: 84 Olympic Games Los Angeles, issued 7/27/84, Ox 97:126, 1984
    • Central Bank Releases Postal Issues, Ox 98:12, 1985
    • Phil. Bull. No. 152: Public Street Lighting, issued 9/9/84, Ox 98:32, 1985
    • Phil. Bull. No. 153: 10th National Stamp Exhibition, issued 9/10/84, Ox 98:33, 1985
    • Phil. Bull. No. 154: Patriotic Symbols, issued 10/29/84, Ox 99:71, 1985
    • Phil. Bull. No. 155: Christmas Tradition, issued 12/7/84, Ox 99:72, 1985
    • Phil. Bull. No. 156: XX CR Bicycle Race, issued 12/19/84, Ox 100:150, 1985
    • Christmas Revenue Stamps 84-85, Ox 103:57, 1986
    • 1984 New Postal Issues, RFC 50:1-2, 1984
    • Postal Rate 1984, RFC 51:1, 1984

    1985

    • Phil. Bull. No. 157: International Youth Year, issued 1/31/85, Ox 100:151, 1985
    • Phil. Bull. No. 158: National Values, issued 2/28/85, Ox 102:47, 1986
    • Phil. Bull. No. 159: Red Cross Centenary, issue 5/3/85, Ox 103:80, 1986
    • Phil. Bull. No. 160: Deportivo Saprissa, issued 7/16/85, Ox 104:112, 1986
    • Phil. Bull. No. 161: Flora & Fauna, issued 11/85, Ox 104:113, 1986
    • Phil. Bull. No. 162: XI Philatelic Exhibition, issued 12/3/85, Ox 105:144, 1986
    • Phil. Bull. No. 163: Centennial Free Education, issued 2/28/86, Ox 106:27, 1987

    1986

    • Shifted Perforation on the Soccer Cup Issue, Alvarez, Ricardo, RFC 79:5, 1986
    • Gold Museum Stamps in 2 Different Perforations, Edwards, Hal, Ox 125:105, 1991
    • Gold Museum Issue Perforation Varieties, Martin, Minor, CRFil 99:13, 1990
    • 1986 Soccer Issue Varieties, Martin, Minor, CRFil 99:14, 1990
    • Soccer Cup Philatelic and Regular Issue, O'Neill, Fred, RFC 76:1-3, 1986
    • Two Plates Used in the 1 Colon of Soccer Cup Issue, O'Neill, Fred, RFC 82:5, 1987
    • Gold Museum Issue Perforation Varieties, O'Neill, Fred, RFC 116:1, 1990
    • 1986 LACSA Issue Minor Varieties, O'Neill, Fred, RFC 144:4-5, 1992
    • Central Bank Releases Postal Issue, Ox 106:7-9, 1987
    • "Philatelic" Stamps of the Soccer World Cup issue, Ox 106:9, 1987
    • Phil. Bull. No. 164: Development International Bank, iss. 3/21/86, Ox 107:57, 1987
    • Phil. Bull. No. 165: Presidents, issued 5/8/86, Ox 107:58, 1987
    • Phil. Bull. No. 166: 1986 Soccer World Cup, issued 5/30/86, Ox 107:59, 1987
    • Phil. Bull. No. 167: International Peace Year, issued 7/86, Ox 107:60, 1987
    • Phil. Bull. No. 168: Gold Museum, issued 9/19/86, Ox 108:92, 1987
    • Phil. Bull. No. 169: Flora & Fauna, issued 12/16/86, Ox 108:93, 1987
    • Tico Times Reports on Wildlife Set, Ox 109:100, 1987
    • Phil. Bull. No. 170: LACSA XL Anniversary, issued 12/86, Ox 109:119, 1987

    1987

    • Issue Commemorate Two Events, Alvarez, Ricardo, RFC 84:2-3, 1987
    • National Museum Issue Varieties, Mena, Hector, RFC 135:2, 1992
    • Background on the Nobel Prize Issue, O'Neill, Fred, RFC 89:2-6, 1988
    • Shifted Colors in National Museum Issue, O'Neill, Fred, RFC 106:1, 1989
    • Central Bank Releases Postal Issues, Ox 107:32, 1987
    • Central Bank Releases Postal Issues, Ox 108:68-69, 1987
    • Central Bank Releases Postal Issues, Ox 109:101, 1987
    • President Arias Honored with Stamp, Ox 110:6, 1988
    • Phil. Bull. No. 171: Science and Technology, issued 7/31/87, Ox 110:19, 1988
    • Phil. Bull. No. 172: National Museum Art, issued 8/7/87, Ox 110:32, 1988
    • Phil. Bull. No. 173: City of San Jose, Rotary, issued 10/87, Ox 110:33, 1988
    • Phil. Bull. No. 174: Columbus Day, issued 10/87, Ox 111:63, 1988
    • Phil. Bull. No. 175: Discovery of America, issued 11/87, Ox 111:64, 1988
    • Phil. Bull. No. 176: Arias Nobel Prize, issued 2/12/87, Ox 111:65, 1988
    • Phil. Bull. No. 177: International Housing Day, issued 12/87, Ox 111:66, 1988
    • Surcharges on Revenue Stamps (1987), RFC 128:2, 1991

    1988

    • Again Airmail Stamps in CR, O'Neill, Fred, RFC 93:1, 1988
    • Spelling Error in New Issue (not emited), O'Neill, Fred, RFC 94:1-2, 1988
    • Natural Resources Issue Perforation Varieties, O'Neill, Fred, RFC 101:4, 1989
    • Central Bank Announces Postal Issue, Ox 110:7, 1988
    • CR-Liechtenstein Cooperation, Ox 112:74, 1988
    • Central Bank Announces Postal Issue, Ox 112:75, 1988
    • Central Bank Announces Postal Issues, Ox 113:103, 1988
    • Phil. Bull. No. 179: Red Cross, issued 4/18/88, Ox 113:134, 1988
    • Central Bank Announces Meteorological Institute Issue, Ox 114:7, 1989
    • Phil. Bull. No. 180: CR-Liechtenstein, issued 6/6/88, Ox 114:31, 1989
    • Phil. Bull. No. 181: Banco Anglo, issued 6/27/88, Ox 114:31, 1989
    • Phil. Bull. No. 182: Aviation Forerunners, issued 9/26/88, Ox 114:32, 1989
    • Phil. Bull. No. 183: Seoul Olympics, issued 9/16/88, Ox 115:66, 1989
    • Phil. Bull. No. 184: Girl's High School, issued 10/17/89, Ox 116:96, 1989
    • Phil. Bull. No. 185: Meteorological Institute, issued 12/26/88, Ox 116:96, 1989
    • Phil. Bull. No. 186: Discovery of America, issued 11/88, Ox 116:97, 1989
    • CR-Liechteinstein Cultural Exchange Issue, Ox 117:114, 1989
    • Phil. Bull. No. 187: Omar Dengo, issued 11/18/88, Ox 117:134, 1989

    1989

    • The 1898 Christmas Postal Tax, O'Neill, Fred, RFC 119:6, 1990
    • Central Bank Announces Flora & Fauna Issue, Ox 115:40, 1989
    • Central Bank Announces New Postal Issues, Ox 117:104-5, 1989
    • FDC for the French Revolution, Ox 117:115, 1989
    • Phil. Bull. No. 189: French Revolution, issued 7/1/89, Ox 118:35, 1990
    • Phil. Bull. No. 190: Grecia Anniversary, issued 8/28/89, Ox 118:35, 1990
    • Phil. Bull. No. 191: America, issued 10/12/89, Ox 120:102, 1990
    • Phil. Bull. No. 192: 100 Years Democracy, issued 10/23/89, Ox 120:102, 1990
    • Phil. Bull. No. 194: Discovery of America, issued 12/89, Ox 122:29, 1991
    • Phil. Bull. No. 188: CR Flora, issued 2/28/89, Ox 117:134, 1989

    1990

    • Central Bank Announces National Theater Issue, Ox 118:11, 1990
    • Stamps Discussed in the Tico Times, Ox:121-122, 1990
    • Central Bank Announces New Issues, Ox 122:11, 1991
    • Phil. Bull. No. 195: National Theater, issued 2/27/90, Ox 122:29, 1991
    • Phil. Bull. No. 196: Soccer Cup, issued 6/1/90, Ox 124:94, 1991
    • First Day Cover for the Christmas Tax Stamps of 1990, Ox 125:112, 1991
    • Phil. Bull. No. 197: University, issued 8/24/90, Ox 125:123, 1991
    • Phil. Bull. No. 200: Coffee, issued 11/16/90, Ox 128:92, 1992
    • Phil. Bull. No. 201: First Postage Stamp, issued 12/6/90, Ox 128:92, 1992
    • Phil. Bull. No. 202: America, issued 12/21/90, Ox 128:93, 1992
    • Phil. Bull. No. 203: Hospitals, issued 12/18/90, Ox 128:93, 1992
    • Phil. Bull. No. 199: Airmail Surcharge, issued 11/5/90, Ox 127:62, 1992
    • Commemorative Cachet- Italy Soccer Cup Issue, RFC 115:6, 1990
    • New Issues in 1990, RFC 116:2, 1990
    • Coffee Propaganda Cachet in 1990 Coffee Issue, RFC 119:3, 1990
    • FDC First Postage Stamp Issue, RFC 120:1, 1990
    • The 1990 Christmas Tax Stamps, RFC 122:4, 1991

    1991

    • Central Bank Announces New Issue, Ox 125:103, 1991
    • New Issues in 1991, RFC 128:1-2, 1991
    • Central Bank Announces 1991 Surcharges Issue, RFC 130:6, 1991
    • Phil. Bull. No. 204: National Theater, issued 3/91, Ox 129:124, 1992
    • Phil. Bull. No. 205: CR Panama Border, issued 5/24/91, Ox 129:124, 1992

    1992

    • Supreme Court Presidents Issue Misfortunes, O'Neill, Fred, RFC 74:1-4, 1986
    • Supreme Court Presidents Issue Misfortune Explanations, O'Neill, Fred, RFC 79:1-4, 1986
    • Supreme Court Presidents Issue 6 Years Later, O'Neill, Fred, RFC 134:1, 1992
    • The Oxcart in a 1992 Issue, O'Neill, Fred, RFC 136:1-2, 1992
    • New 1992 Revenue Stamp, RFC 135:3, 1992
    • New Issue: Discovery of America (10/8/92), Ox 129:101, 1992
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