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CANADA POST NAMIBIA NEW ZEALAND POST SWISS POSTAL SERVICE ROYAL MAIL (UK) UN POSTAL ADMIN.
BOOKS ON PHILATELY BRAD SHEFF C&Js STAMPS CAJ BREJTFUS CHARLESTOWN STAMPS DALE ENTERPRISES EARL APFELBAUM EDWARD HINES ESTUDIO 20 FREEMAN RICHARD FRAJOLA GARY GOMPF GARY PIERSON GEORGE BAXLEY GLEN STEPHENS HAROLD PEASE HENRY GITNER HIKAWA INTERNATIONAL JAMES E. LEE JAN LANGENBERG LAKESHORE LA POSTE LINDNER LORAL MICHAEL DEERY OSBORNE-KAUFMANN PATS STAMPS PHILAGENTA PHILATELIC-BIBLIOPOLE PHILATELIC PHANTASIES PHILATELISTS ONLINE PHILIP&HENRY STEVENS PIONEER PSE R.MARESCH & SONS REGENCY RENE HILLESUM STAMP AUCTION CENTRAL STAMPAZONIA STAMP DEALERS INT. STAMPEDE STANLEY GIBBONS STATESIDE STEVE MALACK STEVEN HADDOCK STUART KATZ T/M THOMAS GOMPF US STAMP WESTMINSTER WHYTE'S WILLIAM LANGS YVERT & TELLIER
AP Research Library American Philatelic Society American Stamp Dealers Association American Topical Society Canadian Philatelic Society Canadian Postal Issues China Philatelic Association Confederate Stamp Allilance El Salvador Philatelic Society Fédération Internationale des Sociétés Aérophilatéliques Fiji Post Filatelia Argentina Filatelia en Portugal Philatelic Federation of Finland Germany Philatelic Society Hampshire Philatelic Federation Coughlin's Stamp Clubs and Societies District Philatelic Society Liverpool Philatelic Society Mobile Post Office Society New Zealand Philatelic Federation National Stamp Dealers Association Oriental Philatelic Association Paraguay Collectors Club Royal Naval Philatelic Society Society for Hungarian Philately Swiss Postal Stationery C.C. The Aerogramme Society Andorran Philatelic Study Circle The British Library The Croydon Philatelic Society The Delphi Stamp Collecting Forum The Faroe Islands Study Circle The Great Britain Collectors Club International Machine Cancel Soc.
