1981. United States. Soil Conservation Service. Shows land use.; "December 1981."; Includes vicinity map. 98 x 126 centimeters 1:50,000. The Service (Harrisburg, Pa.?).
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1981. United States. Soil Conservation Service. Shows land use.; "September 1981."; Includes vicinity map. 83 x 61 centimeters. The Service (Boise, Idaho.?).
1981. United States. Soil Conservation Service. Shows land use.; "September 1980."; Includes location map.; "5,R-38,084." 55 x 43 centimeters. USDA-SCS (Lincoln, Neb.).
1981. United States. Soil Conservation Service. Shows land use.; Includes vicinity map.; "April 1981 4-R-33390." 44 x 44 centimeters. USDA-SCS (Fort Worth, Tex.).
1981. United States. Soil Conservation Service. "Interpretations derived from soil survey published in 1975."; "June 1981."; Includes location map. 69 x 69 centimeters 1:50,000. U.S. Dept. of Agriculture, Soil Conservation Service (Washington.?).
1981. United States. Soil Conservation Service. Shows land use.; "Base: edited by the Geological Survey."; Includes vicinity map.; "May 1981 4-R-37613." 65 x 55 centimeters 1:100,000. The Service (Lexington, Ky.).
1981. United States. Soil Conservation Service. Shows land use.; "Base: prepared by the Geological Survey in cooperation with the Soil Conservation Service."; Includes vicinity map.; "October 198... The Service (Alexandria, La.).
1981. United States. Soil Conservation Service. Interpretations derived from soil map constructed 1966 by Cartographic Division, Soil Conservation Service, USDA, of Ionia County, Michigan and Cen... The Service (Washington, D.C.?).
1981. United States. Soil Conservation Service. Includes notes and location map. Scale 1:50,000.
1981. United States. Soil Conservation Service. Shows land use.; Part of title in Spanish.; Includes location map.; "December 1981 4-R-37726." 66 x 92 centimeters Scale 1:50,000. The Service (San Juan, P.R.).