- United States. Forest Service. Northern Region. State & Private Forestry73
- Mcgregor, Mark D.40
- United States. Forest Service. Northern Region24
- Hamel, Dennis R.21
- Gibson, Kenneth E.16
- James, Robert L.13
- Dooling, Oscar J.11
- Oakes, Robert D.11
- United States. Forest Health Protection10
- Bennett, D. D.9
- Meyer, Hubert E.9
- Dewey, Jerald E.5
- Tunnock, Scott5
- United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management5
- Berg, Malcolm J.4
- Bousfield, Wayne E.4
- Oregon State University. Forest Research Laboratory4
- Schwandt, John W.4
- United States. Forest Service. Northern Region. Forest Environmental Protection4
- Carlson, Clinton E.3