Instructions for making bird count, 1917
By: United States Department of Agriculture, Bureau of Biological Survey.
Contributors: United States. Bureau of Biological Survey.
Series: B.S. doc -- 106
Publisher: G.P.O.
Published: 1917
Place of publication: Washington
Language: eng
Subjects: Birds -- Counting.; Bird populations -- Estimates -- United States.
Other titles: Bird count, 1917
Notes: Caption title.

"Issued February 10, 1917."