Alles van: Ejnar Hertzsprung
Resultaat 1 - 1 (van 1)
Ejnar Hertzsprung Mean colour equivalents and hypothetical angular semi-diameters of 734 stars brighter than the 5th magnitude and within 95° of the North Pole
Engels | 55 pagina's | Enschede, Haarlem | 1922
Gedrukt boek
1922