Several types of floodgates.
Contributors: Washington State University. Cooperative Extension Service.
Series: Extension mimeo -- 2746.; Extension mimeo (Washington State University. Cooperative Extension) -- 2746.
Publisher: College of Agriculture, Cooperative Extension Service, Washington State University
Published: 1967
Place of publication: Pullman, Wash
Language: eng
Notes: Caption title.

"January, 1967."

"E.M. 2746."