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file D (Stack)Pannekoek, A.
"The Astronomical System of Herakleides"
offprint from Proceedings, Series B, of the Koninklijke Nederlandse Akademie van Wetenschappen, vol. LV no. 4, 1952, pp. 374-381 [33-41]. (Communicated 28 June, 1952). Circular no. 4 of the Astronomical Institute of the University of Amsterdam. Amsterdam: North-Holland Publishing Company. Presented by the author
[1955- ]
1952