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Creator
- South Carolina Department of Transportation17
- Schuck-Kolben, R. E.7
- Geological Survey (U.S.)6
- United States. Army. Corps of Engineers5
- United States. Agricultural Stabilization and Conservation Service4
- United States. Department of Agriculture2
- United States. Dept. of Agriculture. Production and Marketing Administration2
- United States. Agricultural Adjustment Administration1
- United States. Agricultural Adjustment Administration. Southern Division1
- United States. Dept. of Agriculture. Commodity Stabilization Service1