United States. Bureau of Chemistry and Soils & Knobel, E. W. (1931). Soil survey of Labette County, Kans. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Bureau of Chemistry and Soils and E. W. Knobel. Soil Survey of Labette County, Kans. Washington: U.S. GPO, 1931.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils and E. W. Knobel. Soil Survey of Labette County, Kans. U.S. GPO, 1931.
Warning: These citations may not always be 100% accurate.