Brazil

1973 Day of the Stamp WM: 16

1973 The 100th Anniversary of the Birth of Alberto Santos Dumont, Aviation Pioneer, 1873-1932

1973 Scientific Research Institute

1973 Brazilian Anniversaries

1973 National Tourism Year

1973 Tropical Birds and Plants

1973 Sporting Events

1973 The 24th Anniversary of the International Chamber of Commerce Congress

1973 Inauguration of the Ministry of Communications Building, Brasilia

1973 Inauguration of “Bracan I” Underwater Cable, Recife to Canary Islands