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Authors
Author
O. Heckmann
Books
Astrophysik IV: Sternsysteme / Astrophysics IV: Stellar Systems
Jerzy Neyman, Frank K. Edmonson, Bertil Lindblad, J. H. Oort, Helen Sawyer Hogg, R. Hanbury Brown, B. Y. Mills, G. de Vaucouleurs, F. Zwicky, Elizabeth L. Scott, G. C. McVittie, O. Heckmann, E. Schücking