The Subspecies of Branta Canadensis (Linnaeus)
Swarth, Harry S. (Harry Schelwald), 1878-1935
Article
1920
The Auk
37
268--272
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/121792 DOI: https://doi.org/10.2307/4072715