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- International Astronomical Union. Symposium (11)
- International Astronomical Union (4)
- Blaauw, Adriaan (2)
- International Union of Theoretical and Applied Mechanics (2)
- Bracewell, Ronald Newbold, 1921- (1)
- Brouwer, Dirk, 1902- (1)
- Burgers, J. M. (Johannes Martinus), 1895- (1)
- Greenstein, Jesse L. ed (1)
- Herbig, G. H. (George H.) (1)
- Hulst, H. C. van de (Hendrik Christoffel), 1918- (1)
- International Astronomical Union. (1)
- International Scientific Radio Union (1)
- Larsson-Leander, G. (1)
- Lehnert, Georg, b. 1862 (1)
- Paris Symposium on Radio Astronomy (1)
- Roman, N. G. (1)
- Roman, Nancy Grace, 1925- (1)
- Symposium on Cosmical Gas Dynamics (1)
- Thomas, Richard Nelson, 1921- (1)