- James, Robert L.6
- United States. Forest Service. Northern Region6
- United States. Forest Health Protection3
- United States. Forest Service. Northern Region. State & Private Forestry2
- Bingham, Richard T.1
- Carlson, Clinton E.1
- Dooling, Oscar J.1
- Gilligan, Carma J.1
- Grasham, John L.1
- Hagle, Susan K.1
- Johnson, Norman E.1
- Schwandt, John W.1
- Simpson, Victor1
- United States. Bureau Of Entomology1
- United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management1
- Webb, J. L. (Jesse Lee), 1878 19421
- Zack, Art1