Economic ornithology and the correlation of laboratory and field methods
By: by Clarence Cottam, Senior Biologist, In Charge Section of Food Habits, Division of Wildlife Research
Contributors: United States. Bureau of Biological Survey; U.S. Fish and Wildlife Service
Series: Wildlife leaflet -- BS-30; Wildlife leaflet -- BS-30.
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service
Published: 1936
Place of publication: Washington, D.C
Language: eng
Number of pages: 13
Subjects: Beneficial birds; Research; Feeding and feeds
Notes: Caption title.

"January 1936"

Includes bibliographical references (p. 12).