scholarly article

article by Walter Baade and Nicholas U. Mayall, published 1951

article by Walter Baade, published 1951

scientific article published in the Astrophysical Journal

scientific article published in the Astrophysical Journal

scientific article published in the Astrophysical Journal

scientific article published in Astronomical Journal

scientific article

scientific article (publication date: October 1938)

Article from 'Scientific American', published in September 1956

scientific article published in the Astrophysical Journal

scientific article published in September 1961

article by Walter Baade published August 1934 in Publications of the Astronomical Society of the Pacific

scientific article published in the Astrophysical Journal

scientific article