[Letter requesting aid in study of bird migration]
Contributors: United States. Division of Biological Survey; United States. Department of Agriculture
Series: Circular / U.S. Dept. of Agriculture. Division of Biological Survey -- no. 41; Circular (United States. Bureau of Biological Survey) -- no. 41.
Publisher: United States Department of Agriculture, Biological Survey
Published: 1904
Place of publication: Washington, D.C
Language: eng
Subjects: Birds; Migration; Research
Other titles: For many years the Biological Survey has been collecting data on the migration of birds ...
Notes: Title supplied by cataloger.

"January 26, 1904."

Letter from C. Hart Merriam, the Chief of the Biological Survey, regarding the migration of birds.

Biological Survey Circular No. 41.

At head of title: United States Department of Agriculture, Biological Survey.