Notes on Certain Flycatchers of the Genus Empidonax
Brewster, William, 1851-1919
Article
1895
The Auk
12
157--163
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/124532 DOI: https://doi.org/10.2307/4068836