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Publisher
- United States Geological Survey202
- National Geospatial-Intelligence Agency162
- USDA-SCS (Fort Worth, Tex.)62
- Wallace, McHarg, Roberts and Todd60
- Dept. of Agriculture, Soil Conservation Service (Washington.)55
- U.S. Geological Survey (Washington, D.C)55
- publisher not identified40
- The Service (Washington, D.C.?)34
- The Survey (Washington, D.C)33
- (London)28
- Dept. of Agriculture, Soil Conservation Service (Fort Collins, Colo.)27
- The Department (St. Paul, Minnesota)24
- General Land Office (Washington)23
- General Land Office (Washington, D.C)19
- The Survey (Washington)18
- Sanborn Map Company (New York), 191317
- American Geographical Society (New York)15
- U.S. Dept. of Agriculture, Soil Conservation Service (Washington.)15
- Polar Geospatial Center14
- The Office (Washington, D.C)14