Dicionário de termos literários / Harry Shaw; traduzido do inglês e adaptado por Cardigos dos Reis
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
Taschenworterbuch der datenkommunikation : A-Z je sprache uber 1.000 worter und begriffe mit DIN-und internationalen definitionen / Wilhem H. Carl
The 1990 world satellite annual : the official supplement of the world satellite almanac / Mark Long