Center pivot sprinkler systems
By: [prepared by Mel A. Hagood].
Contributors: Washington State University. Cooperative Extension Service.
Series: Extension mimeo -- 3550.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 3550.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1972
Place of publication: Pullman
Language: eng
Notes: Cover title.

"April 1972."

"E.M. 3550."