Empidonax Griseus Brewster vs. Empidonax Canescens Salvin and Godman
Nelson, Edward William, 1855-1934
Article
1907
The Auk
24
99--100
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/121845 DOI: https://doi.org/10.2307/4070349