Schalén, C. (1928). The space distribution of B and A type stars in bright and dark galactic regions: Researches based on determinations of spectral type and luminosity class for 4300 stars. Almqvist & Wiksell.
Chicago Style (17th ed.) CitationSchalén, Carl. The Space Distribution of B and A Type Stars in Bright and Dark Galactic Regions: Researches Based on Determinations of Spectral Type and Luminosity Class for 4300 Stars. Stockholm: Almqvist & Wiksell, 1928.
MLA (9th ed.) CitationSchalén, Carl. The Space Distribution of B and A Type Stars in Bright and Dark Galactic Regions: Researches Based on Determinations of Spectral Type and Luminosity Class for 4300 Stars. Almqvist & Wiksell, 1928.
Warning: These citations may not always be 100% accurate.