1985. United States. Soil Conservation Service. "February 1985 Base 4-R-39098."; Shows land use.; Includes vicinity map. 42 x 64 centimeters 1:100,000. USDA-SCS (Fort Worth, Tex.).
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1980. United States. Soil Conservation Service. "Lambert conformal conic projection."; Source: SCS family of maps drawing 5,P-30,974 (revised 8-79).; "3-80. 5,S-37,760."; Includes vicinity map. 4... Dept. of Agriculture, Soil Conservation Service (Lincoln, Neb.).
1978. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1975; interpretations derived from soil map constructed 1973.; "Projection and 10,000-metre grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).
1977. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1975; interpretations derived from soil map constructed 1976.; "Projection and 10 000-metre grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).
1977. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1975; interpretations derived from soil map constructed 1964.; "Projection and 10,000-metre grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).