Media type: E-Article Title: The mass of M 81 Contributor: Munch, Guido imprint: American Astronomical Society, 1957 Published in: The Astronomical Journal Language: Not determined DOI: 10.1086/107445 ISSN: 0004-6256 Keywords: Space and Planetary Science ; Astronomy and Astrophysics Origination: Footnote: Access State: Open Access