The Main Divisions of the Swifts
Lucas, Frederic A. (Frederic Augustus), 1852-1929
Article
1889
The Auk
6
8--13
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/124247 DOI: https://doi.org/10.2307/4067429