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- International Astronomical Union (2)
- Astronomisches Rechen-Institut, Heidelberg (1)
- Burkhardt, G. (1)
- Böhme, Siegfried (1)
- COSPAR (1)
- Chiu, Hong-yee, 1932- (1)
- Esser, U. (1)
- Fachinformationszentrum Energie, Physik, Mathematik (1)
- Goddard Institute for Space Studies (1)
- Heinrich, Inge (1)
- Jager, C. de (Cornelis de), 1921- (1)
- Piddington, J. H. (Jack Hobart) (1)
- Remo, John L. (1)
- Schmadel, Lutz D. (1)
- State University of New York at Stony Brook. Dept. of Earth and Space Sciences (1)
- State University of New York at Stony Brook. Dept. of Physics (1)
- Summer Institute for Observational Astronomy (1)
- Symposium on Solar Flares and Space Research (1968 : Tokyo, Japan) (1)
- Warasila, Robert L. (1)
- Švestka, Zdeněk (1)