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- Szebehely, Victor G., 1921- (4)
- Alexander von Humboldt Colloquium on Celestial Mechanics (1)
- Balázs, Béla (1)
- Berger, A. (André), 1942- (1)
- Bhatnagar, K. B. (1)
- Colloquia Copernicana (1)
- Copernicus Symposium (1)
- Dobrzycki, Jerzy (1)
- Duncombe, Raynor L. (1)
- Dvorak, R. (1)
- European Physical Society. Astronomy and Astrophysics Division (1)
- International Astronomical Union (1)
- International Astronomical Union. Colloquium (1)
- International Astronomical Union. Symposium (1)
- International Union of the History and Philosophy of Science. Nicolas Copernicus Committee (1)
- International Workshop on Dynamical Astronomy (1)
- International Workshop on Space Dynamics and Celestial Mechanics (1)
- Lemaître, Georges, 1894- (1)
- Message, P. J. (1)
- Mezzetti, M. (Marino) (1)
- NATO Advanced Study Institute (1)
- NATO Advanced Study Institute on Long-Term Dynamical Behaviour of Natural and Artificial N-Body Systems (1)
- NATO Advanced Study Institute on Stability of the Solar System and Its Minor Natural and Artificial Bodies (1)
- North Atlantic Treaty Organization. Scientific Affairs Division (1)
- Roy, A. E. (Archie Edmiston), 1924- (1)
- Trieste International Meeting (1)
- University of Texas at Austin. Space Programme (1)
- Vikram Sarabhai Space Centre (1)
- 古在, 由秀(1928-) (1)