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Publisher
- Department of Geography, Indiana University62
- Indiana Department of Geology and Natural Resources43
- William B. Burford40
- The Bureau31
- The Committee20
- Bureau of Soils5
- Indiana Geological Survey5
- The Board5
- United States Bureau of Agricultural Economics5
- U.S. Bureau of Agricultural Economics4
- For sale by United States Geological Survey3
- State Highway Commission of Indiana3
- Bureau of Chemistry and Soils2
- Joint Highway Research Project, Purdue University2
- Ohio. Division of Water2
- Rand McNally2
- The Division2
- The Project2
- The Survey2
- United States Department of Agriculture, Soil Conservation Service2