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 / 
edited by Frederick C. Durant III and George S. James 
 - Washington  :  Smithsonian Institution Press,  1974 
 - 307 p.  :  ill.  24 cm. 
 - Smithsonian annals of flight  no. 10 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronautics--History--Congresses<br/>Rocketry--History--Congresses