Zoekresultaten
Resultaat 1 - 2 (van 2)
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
Gedrukt boek
P.Th. Oosterhoff The variable stars in Messier 5
Engels | 48 pagina's | Enschedé, Haarlem | 1937
Gedrukt boek
P.Th. Oosterhoff