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Publisher
- Sanborn Map Company3,091
- United States Surveyor General1,691
- Works Progress Administration of Pennsylvania1,159
- Sanborn-Perris Map Co.613
- Sanborn Map & Publishing Co.162
- Iowa Publishing Co.142
- Anderson Publishing Co.126
- W.W. Hixson & Co.94
- Geo. A. Ogle & Co.93
- North West Publishing Co.86
- Department of Geography, Indiana University73
- State Highway Commission of Indiana64
- USDA-SCS (Fort Worth, Tex.)62
- Wallace, McHarg, Roberts and Todd60
- Indiana Department of Geology and Natural Resources58
- Dept. of Agriculture, Soil Conservation Service (Washington.)55
- U.S. Geological Survey (Washington, D.C)55
- Franklin Survey Co.54
- William B. Burford50
- NJ Department of Environmental Protection48