General soil map, State of Alabama - Public domain map

"Base compiled from 1:500,000 USGS base map."
"January 1974 4-R-33,619. Revised April 1973 Base 4-R-32,597."
Accompanied by text: Soil associations of Alabama / B.F. Hajek, F.L. Gilbert, and C.A. Steers. Auburn : Agricultural Experiment Station, Auburn University, [1975]. 30 p. : col. ill., tables, glossary ; 28 cm. (Agronomy and soils departmental series ; no. 24).
Available also through the Library of Congress Web site as a raster image.