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Creator
- United States. Agricultural Stabilization and Conservation Service3
- United States. Dept. of Agriculture. Production and Marketing Administration2
- Gilbert Thompson, Geographer in Charge1
- Henry Gannett, Chief Geographer1
- Topography by C.M. Yeates1
- Triangulation by U.S. Coast and Geodetic Survey1
- United States. Dept. of Agriculture. Commodity Stabilization Service1