Postmarks of South West Africa Under South African Administration : A comprehensive study 1914 - 1977 Including a complete listing of all S.W.A. Post Offices with a special sections on S. African military campaign postmarks 1914-1915 railways sations cacellations 1915 - 1977 telegraph Stations, airmail history of S.W.A. cencor cachets, ships postmarks, etc. / Ralph F. Putzel
Illustraded encyclopedia of stamp collecting / Otto Hornung; fotografias de Zdenek Humpál
The 1990 world satellite annual : the official supplement of the world satellite almanac / Mark Long
Dictionarium museologicum : dictionary of museology=Dictionnaire de muséologie= Dicionário / ed. ICOM
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