Empidonax Griseus Brewst. = E. canescens Salv. & Godm
Nelson, Edward William, 1855-1934
Article
1904
The Auk
21
80--80
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/121460 DOI: https://doi.org/10.2307/4069930