1977. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map dated 1976; interpretations derived from soil map constructed 1968.; "Projection and 10,000-metre grid ... Dept. of Agriculture, Soil Conservation Service (Washington.).
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1977. United States. Soil Conservation Service. Universal Transverse Mercator projection; 1927 North American datum.; May 1977.; Indexed. 92 x 66 centimeters 1:50,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1977. United States. Soil Conservation Service. Universal Transverse Mercator projection; 1927 North American datum.; Mar. 1977.; Indexed. 112 x 92 centimeters 1:50,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1977. United States. Soil Conservation Service. Universal Transverse Mercator projection; 1927 North American datum.; June 1977.; Indexed. 112 x 92 centimeters 1:50,000. Dept. of Agriculture, Soil Conservation Service (Washington.).
1977. United States. Soil Conservation Service. Title varies: Prime farmlands ... Indiana.; Geographic coverage by counties.; Definition of prime farmland and "Produced under contract printing" s... The Service (Washington.).
1977. United States. Soil Conservation Service. Includes notes and location map. Scale 1:50,000.
1977. United States. Soil Conservation Service. Includes notes and location map. Scale 1:50,000.
1977. United States. Soil Conservation Service. Includes notes and location map. Scale 1:50,000.
1977. United States. Soil Conservation Service. Universal Transverse Mercator projection; 1927 North American datum.; May 1977.; Indexed. 92 x 112 centimeters Scale 1:50,000. 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.).