Researches of Gerhard Heilmann on the Origin of Birds
Shufeldt, Robert Wilson 1850-1934
Article
1914
The Auk
31
287--289
BioStor
English
Washington, D.C, American Ornithologists' Union, etc, 1884-
BioStor: https://biostor.org/reference/121352 DOI: https://doi.org/10.2307/4071771