- Oregon State University. Extension Service48
- Oregon State University. Agricultural Experiment Station33
- United States. Forest Service. Northern Region. State & Private Forestry13
- Oregon State University. Forest Research Laboratory12
- Gardner, E. Hugh9
- Jackson, T. L.7
- Mcgregor, Mark D.7
- Oregon. Department Of Fish And Wildlife7
- Stebbins, Robert L.7
- United States. Department Of Agriculture7
- Vough, Lester Ray, 1944 7
- Hamel, Dennis R.6
- Ball, John L.4
- Hosie, Michael J.4
- Johnson, M. J. (Malcolm Julius)4
- Murphy, Bill (William Michael)4
- Oregon State University. Extension Service/Marine Advisory Program4
- Oregon State University. Water Resources Research Institute4
- Pacific Northwest Cooperative Extension4
- University Of Idaho. Cooperative Extension Service4