The Astrophysical Journal · 1913 · 93 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsSpectroscopyStellar AstronomyInterstellar Absorption LinesSpectral Line AstronomyStellar AstrophysicsStellar ClassificationStellar SpectroscopyStellar StructureAstrochemical Line IdentificationLine Profile AnalysisStellar SpectraStellar Spectral Classification