First steps toward space : 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 - Symposium on the History of Astronautics (1st : 1967 : Belgrad); Durant, Frederick C., 1916-; James, George S.; International Academy of Astronautics (Washington : Smithsonian Institution Press, 1974)
Keywords: Astronautics -- History -- Congresses; Rocketry -- History -- Congresses