Electric beacons used to frighten wild ducks from grainfields
By: by Ralph H. Imler
Contributors: U.S. Fish and Wildlife Service
Series: Wildlife leaflet -- 256; Wildlife leaflet -- 256.
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service
Published: 1944
Place of publication: Chicago, Ill
Language: eng
Subjects: Ducks; Control; Agricultural pests
Notes: Caption title.

"June 1944."