First steps toward space
Subtitle: proceedings of the first and second History Symposia of the International Academy of Astronautics at Belgrade, Yugoslavia, 26 September 1967, and New York, U.S.A., 16 October 1968
Publisher: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]
Published: 1974-01-01