1980. United States. Soil Conservation Service. Shows land use.; "September 1980."; Includes vicinity map. 129 x 102 centimeters 1:50,000. The Service (Harrisburg, Pa.).
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1982. United States. Soil Conservation Service. Shows land use.; "January 1982." 109 x 68 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "January 1983."; Includes location map. 91 x 112 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map. 122 x 95 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.?).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map.; "Sheet 2 of 2." 112 x 91 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1982. United States. Soil Conservation Service. "Interpretations derived from soil survey sheets completed 1979 by Soil Conservation Service, USDA, of Valley County, Montana."; "August 1982 BASE ... The Service (Fort Worth, Tex.).
1980. United States. Soil Conservation Service. "Base map compiled in 1980 by Soil Conservation Service ... from USGS 1:24 000 scale topographic maps dated 1953-1963".; "Interpretations derived f... Geological Survey (Washington, D.C.?).