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Herman Cudris Castaņeda
Stamps Category Science Herman Cudris Castaņeda
40th Anniversary of the National Council of Science and Technology - Conacyt.
Mexico
Chemist, Victor Gregnard 1871-1935.
France
Koffler Tower - of the Canadian Center for Nuclear Physics - (S/647 and Mi/781)
Israel
Centenary of the Air Union - International Telecommunications - ITU
Venezuela
Space Program, Vosztok Urhajo.
Hungary
International Geophysical Year 1957-1958. Chilean Antarctic Territory.
Chile
10th Anniversary of the Humboldt Planetarium - URANO.
Venezuela
10th Anniversary of the Humboldt Planetarium - NEPTUNE.
Venezuela