"January 1981 4-R-37574. Revised March 1977 Base 4-R.31229." At head of title: Figure 14. "Base compiled from latest Alabama general highway map." "1,000 foot grid ... Alabama State Plane Coordinate System, West Zone." "Source: Black Warrior and Alabama River Basin study reports, Soil Conservation Service, Auburn, Alabama." Includes location map. Available also through the Library of Congress Web site as a raster image.
United States. Soil Conservation Service
1981
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