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Publisher
- W.W. Hixson & Co.109
- Iowa. State Planning Board101
- United States. Agricultural Stabilization and Conservation Service94
- United States. Department of Agriculture94
- Franklin Survey Co.54
- Генеральный штаб Красной Армии40
- Управление военных топографов34
- Published by W. W. Hixson & Co.25
- published by W.W. Hixson & Company25
- Published by W.W. Hixson & Co.23
- The Company17
- Генеральный штаб РККА16
- University of Iowa11
- Sanborn Map Company7
- Geological Survey (U.S.)6
- Geological Survey Division (Urbana, Ill.)6
- Franklin Survey Company5
- Sanborn Map Company (New York), 19135
- The Bureau5
- Kean Map Co.2