Food habits of the swallows
Subtitle: a family of valuable native birds
By: by F.E.L. Beal
Series: Bulletin / United States Department of Agriculture -- no. 619; Bulletin of the U.S. Department of Agriculture -- no. 619.
Publisher: U.S. Dept. of Agriculture
Published: 1918
Place of publication: Washington, D.C
Language: eng
Number of pages: 28
Subjects: Swallows; Food
Notes: Cover title.

Contribution from the Bureau of Biological Survey.

"Professional paper."