Alles van: P.Th. Oosterhoff
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P.Th. Oosterhoff Discussion of 25 variable stars in a region around CPD - 31°5547
Engels | Staatsdrukkerij, 's-Gravenhage | 1954
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P.Th. Oosterhoff A study of the double cluster in Perseus, based on photographic magnitudes and effective wavelength derived from plates taken by E. Hertzsprung at the Potsdam and Mount Wilson Observatories
Engels | 120 pagina's | Enschede, Haarlem | 1937
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P.Th. Oosterhoff The variable stars in Messier 5
Engels | 48 pagina's | Enschedé, Haarlem | 1937
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