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- International Astronautical Congress (31)
- Duboshin, G. N. (Georgiĭ Nikolaevich) (12)
- Hilton, W. F. (12)
- Łunc, Michał (12)
- Jaumotte, A. (8)
- Brun, Edmond (4)
- Contensou, P. (4)
- Hersey, Irwin (4)
- International Academy of Astronautics (4)
- Lunar International Laboratory Symposium (3)
- Malina, Frank J. (3)
- Baker, Robert M. L. (1)
- International Orbital Laboratory Symposium (1)
- Makemson, Maud W. (1)
- Singer, S. Fred (Siegfried Fred), 1924- (1)
- Thompson, Gordon Vallins Elliot (1)