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- Purdue University Libraries90
- Department of Geography, Indiana University72
- State Highway Commission of Indiana64
- Indiana Department of Geology and Natural Resources57
- William B. Burford49
- The Bureau31
- The Committee22
- W.W. Hixson & Co.17
- The Service (Washington, D.C.?)16
- Geological Survey (U.S.)15
- Indiana Geological Survey15
- Rand McNally14
- U.S. Dept. of Agriculture, Soil Conservation Service (Washington.)14
- Geological Survey Division (Urbana, Ill.)9
- H.M. Gousha8
- The Service (Indianapolis, Ind.?)8
- The Survey8
- The Commission7
- Indiana University6
- Bureau of Soils5