- United States. Forest Service. Northern Region. State & Private Forestry85
- Mcgregor, Mark D.37
- Hamel, Dennis R.20
- Dooling, Oscar J.14
- Bennett, D. D.9
- Gibson, Kenneth E.9
- Meyer, Hubert E.9
- Oakes, Robert D.8
- Tunnock, Scott5
- United States. Forest Service. Northern Region. Forest Environmental Protection5
- Berg, Malcolm J.4
- Bousfield, Wayne E.4
- Carlson, Clinton E.3
- Dewey, Jerald E.3
- Byler, James W.2
- Hard, John S.2
- Kohler, Steve2
- United States. Forest Service. Northern Region. Forest Insect And Disease Management2
- Williams, Ralph E.2
- Brown, Doland H.1