Shows soil types classification by colors and symbols. "Field operations Bureau of Chemistry and Soils 1930. "Williams & Heintz Co. Wash. D.C."
Imprint: [Washington, D.C.] : Bureau of Soils, 1930?
Scale: 1:63,360; Dimensions: 57 x 54 cm
Coordinates: W0870400 W0864100 N0383200 N0381200