United States. Bureau of Chemistry and Soils. (1938). Selenium occurrence in certain soils in United States with discussion of related topics, third report. [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, Third Report. [Washington]: [s.n.], 1938.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils. Selenium Occurrence in Certain Soils in United States with Discussion of Related Topics, Third Report. [s.n.], 1938.
Warning: These citations may not always be 100% accurate.