The Validity of the Red-Legged Subspecies of Black Duck
Townsend, Charles Wendell, 1859-1934
Article
1912
The Auk
29
176--179
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/122585 DOI: https://doi.org/10.2307/4071352