The Labrador Chickadee (Penthestes hudsonicus nigricans) in a Southward Migration
Townsend, Charles Wendell, 1859-1934
Article
1917
The Auk
34
160--163
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/124582 DOI: https://doi.org/10.2307/4072480