XIIth International Astronautical Congress, Washington, D.C., 1961. XII. Internationaler Astronautischer Kongress. XIIe Congrès International d'Astronautique. (Under the auspices of the American Rocket Society.) Proceedings /
International Astronautical Federation.
Baker, Robert M. L.
Makemson, Maud W.
Wien; London, 
1963.
[With a bibliography.]