MMean ionization in stellar atmospheresMean ionization in stellar atmospheresde Henry Norris RussellMateriasIonizationSpectraStarsEdiciones (1)Mean ionization in stellar atmospheres (1932)inglésMás obras de Henry Norris RussellThe HR diagramIIn memory of Henry Norris RussellIn memory of Henry Norris RussellAAstronomyAstronomy
PPhotographic determinations of the position of the moonPhotographic determinations of the position of the moon
