- Balaban, Nancy53
- L'Isle, Guillaume de, 1675-172653
- Survey of India53
- Chandler, Val W.52
- Minnesota. Department of Highways52
- Schwartz, George M. (George Melvin), 1892-198052
- Walker, Alfred C.49
- Farmer (Saint Paul, Minn.)47
- United States. Bureau of Public Roads44
- Hobbs, Howard C.42
- Schmidt, James J.42
- Minnesota Geological Survey41
- Mitchell, S. Augustus (Samuel Augustus), 1792-186841
- United States41
- Alden Publishing Co.40
- Ringborg, Axel39
- Boerboom, Terrence J.38
- Morey, G.B.38
- Setterholm, Dale R.37
- Soil Conservation Service36