Sperm studies as a guide in fur-animal breeding practice
By: by Robert K. Enders
Contributors: United States. Bureau of Biological Survey; U.S. Fish and Wildlife Service
Series: Wildlife leaflet -- 215; Wildlife leaflet -- 215.
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service
Published: 1942
Place of publication: Washington, D.C
Language: eng
Subjects: Fur-bearing animals; Breeding
Notes: Caption title.

"April 1942."

"This leaflet supersedes Wildlife research and management leaflet BS-138 issued in June 1939 ... "