Description of a New Empidonax, with Notes on Empidonax difficilis
Oberholser, Harry C. (Harry Church), 1870-1963
Article
1897
The Auk
14
300--303
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/124492 DOI: https://doi.org/10.2307/4068642