United States. Bureau of Chemistry and Soils. (1935). Selenium occurrence in certain soils in United States, with discussion of related topics. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Chemistry and Soils. Selenium Occurrence in Certain Soils in United States, with Discussion of Related Topics. [Washington]: [s.n.], 1935.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils. Selenium Occurrence in Certain Soils in United States, with Discussion of Related Topics. [s.n.], 1935.
Warning: These citations may not always be 100% accurate.