United States. Bureau of Chemistry and Soils. (1938). Chemical composition of soils and colloids of Norfolk and related soil series. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Chemistry and Soils. Chemical Composition of Soils and Colloids of Norfolk and Related Soil Series. [Washington]: [s.n.], 1938.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils. Chemical Composition of Soils and Colloids of Norfolk and Related Soil Series. [s.n.], 1938.
Warning: These citations may not always be 100% accurate.