- United States. Forest Service. Northern Region. State & Private Forestry83
- United States. Forest Service43
- United States. Forest Service. Northern Region37
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club31
- Mcgregor, Mark D.25
- James, Robert L.21
- Gibson, Kenneth E.19
- Dooling, Oscar J.16
- Bousfield, Wayne E.14
- Oakes, Robert D.14
- Tunnock, Scott13
- Hamel, Dennis R.12
- Bennett, D. D.10
- Meyer, Hubert E.8
- Oregon State University. College Of Forestry7
- Oregon State University. Forest Research Laboratory7
- Dewey, Jerald E.6
- Flavell, Thomas H.6
- Eder, Robert G.5
- Hard, John S.5