Food habits of the swallows, a family of valuable native birds
By: by F.E.L. Beal ...
Contributors: United States. Bureau of Biological Survey.
Series: Bulletin / United States Department of Agriculture -- no. 619; Professional paper; Bulletin (United States. Dept. of Agriculture) -- no. 619.; Bulletin (United States. Dept. of Agriculture)
Publisher: G.P.O.
Published: 1918
Place of publication: Washington
Language: eng
Number of pages: 28
Subjects: Swallows; Birds -- Food
Notes: Cover title.

"Contribution from the Bureau of Biological Survey."