Publications of the Astronomical Society of the Pacific · 1959 · 175 citations · 0 references
Natural SciencesAstronomyAstrophysicsObservational AstronomyStellar AstronomySky SurveysStar CatalogsStellar EvolutionStellar ObservationsStellar PhotometryStellar PopulationsGalaxy Population StudiesIntegrated Stellar PopulationsStar Cluster PopulationsStellar Population ClassificationStellar Populations In GalaxiesSurface Brightness FluctuationsSurface Brightness Profiles