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Annibale Riccò
V. G. Fesenkov
Martin Elvis
John N. Bahcall
Albert Brester
Ernst Joachim Meyer
R. F. Mushotzky
International Astronomical Union. Colloquium
Werner Lohmann
Bruce Margon
J. Warzée
J. B. De Mees
Alex S. Hill
G. H. Jacoby
Suresh Chanmugam
P. L. Bender
T. Maccacaro
Eduard Lindemann