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- International Astronautical Congress (11)
- Contensou, P. (4)
- Duboshin, G. N. (Georgiĭ Nikolaevich) (4)
- Hilton, W. F. (4)
- International Astronomical Union. General Assembly (4)
- Łunc, Michał (4)
- International Conference on Nonlinear Oscillations (2)
- Kleczek, Josip (2)
- Ambart︠s︡umi︠a︡n, V. A. (Viktor Amazaspovich) (1)
- Butzer, Paul Leo, 1928- (1)
- Bŭlgarska akademii︠a︡ na naukite (1)
- COSPAR (1)
- Conference on Linear Operators and Approximation (1)
- Deutsch, A. N. (1)
- Freiberger, Walter F. (1)
- Haze, W. Th. (1)
- International Astronomical Union (1)
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- Kahane, Jean-Pierre, 1926- (1)
- Kleczková, Helena (1)
- Mathematisches Forschungsinstitut Oberwolfach (1)
- Millman, Peter M. (Peter MacKenzie) (1)
- Mirzoi︠a︡n, L. V. (1)
- Orlov, B. A. (1)
- Půst, Ladislav (1)
- Schmidt, Günther, 1921- (1)
- Shajn, G. A. (1)
- Steinberg, Jean-Louis (1)
- Symposium on Meteorite Research(1968 : Vienna) (1)
- Szőkefalvi-Nagy, Béla, 1913- (1)
- Weinert, Horst (1)
- Zverev, M. S. (1)
- Československá akademie věd. Ústav termomechaniky (1)