Publisher
- Indiana. Department of Conservation8
- Indiana. State Highway Commission (1961-1981)7
- Scarborough Company7
- Ed Leary & Associates6
- George F. Cram Company6
- [United States Engineer Office]6
- C.S. Hammond & Company5
- F.L. Knight & Sons5
- Indiana University, Bloomington. Department of Geography5
- Indiana. State Planning Board5
- Joint Highway Research Project (Ind.)5
- Mitchell, S. Augustus (Samuel Augustus), 1792-18685
- C.S. Mendenhall (Firm)4
- Guide Art Co.4
- Indiana. Department of Geology and Natural History4
- Indiana. Department of Highways4
- Mendenhall, Edward4
- United States. Army. Corps of Engineers4
- United States. Soil Conservation Service4
- Bridgman, E. C.3