WAcadémie Royale de PhilatélieWAll-Russian Society of PhilatelistsWBund Philatelistischer PrüferWFederación Interamericana de FilateliaWFédération Internationale de PhilatélieWForschungs- und Arbeitsgemeinschaft Irland e.V.WGrand Prix ClubWHellenic Philotelic SocietyWInter-Governmental Philatelic CorporationWInternational Philatelic Libraries AssociationWMEPSIWMoscow Municipal Society of CollectorsWMoscow Society of Philatelists and CollectorsWMoscow Society of Stamp CollectorsWPhilatelic InternationalWRussian Bureau of PhilatelyWScouts on Stamps Society InternationalWPhilatelic and Numismatic Office of the Vatican City State
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