Selenium occurrence in certain soils in the United States, with a discussion of related topics
Subtitle: fourth report
By: by K. T. Williams, H. W. Lakin, and Horace G. Byers.
Contributors: Lakin, Hubert William, 1907-; Byers, Horace G. b. 1872.; United States. Dept. of Agriculture.
Series: Technical bulletin / United States Department of Agriculture -- no. 702; Technical bulletin (United States. Dept. of Agriculture) -- no. 702.
Publisher: U.S. Dept. of Agriculture
Published: 1940
Place of publication: Washington, D.C
Language: eng
Number of pages: 60
Subjects: Soils -- Selenium content -- United States; Soils -- Selenium content -- Mexico
Notes: Cover title.

"July 1940."

Literature cited: p. 56-59.