Screw-worms
Subtitle: how to recognize and control infestations in livestock
By: [prepared by E.W. Laake ... Ephraim Hixson ... and H.C. Severin]
Contributors: Hixson, Ephraim; Severin, H. C.; United States. Bureau of Entomology and Plant Quarantine
Series: PA -- 100; Program aid (United States. Department of Agriculture) -- no. 100.
Publisher: Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, U.S. Dept. of Agriculture
Published: 1950
Place of publication: Washington, D.C.]
Language: eng
Subjects: Control; Screwworm; Livestock; Diseases and pests
Other titles: Screwworms
Notes: Cover title.

"April 1950."

Includes bibliographical references (page 6).