1981. United States. Soil Conservation Service. Includes location map. 76 x 72 centimeters Scale 1:50,000. The Service (Place of publication not identified.).
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1981. United States. Soil Conservation Service. "August 1981."; Includes location map. 98 x 55 centimeters Scale 1:50,000. The Service (Place of publication not identified.).
1981. United States. Soil Conservation Service. Includes location map. 66 x 81 centimeters Scale 1:50,000. The Service (Place of publication not identified.).
1981. United States. Soil Conservation Service. Includes location map. 98 x 71 centimeters Scale 1:50,000. The Service (Place of publication not identified.).