Pumpback systems.
Series: Extension mimeo -- 3940.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 3940.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1975
Place of publication: Pullman
Language: eng
Notes: Cover title.

"Prepared by Mel A. Hagood"--P. 3.

"E.M. 3940, May 1975"--Cover.