United States. Bureau of Chemistry and Soils. (1936). Chemical and physical properties of dry--land soils and of their colloids. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Chemistry and Soils. Chemical and Physical Properties of Dry--land Soils and of Their Colloids. [Washington]: [s.n.], 1936.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils. Chemical and Physical Properties of Dry--land Soils and of Their Colloids. [s.n.], 1936.
Warning: These citations may not always be 100% accurate.