MapEva growth center, year 2000, soil suitability for septic tanks, Morgan County, Alabama "January 1980 37379-12. June 1979 Base 4-R-37110-12." "Base compiled from latest USGS quad sheets." Includes location maps. Available also through the Library of Congress Web site as a raster image.
- Contributor: United States. Soil Conservation Service
- Date: 1980