- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)32
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club31
- Oregon State University. Forest Research Laboratory11
- Oregon State University. College Of Forestry7
- United States. Forest Service6
- Oregon State University. Extension Service5
- Pacific Northwest Forest Experiment Station (Portland, Or.)5
- Elwood, Norman E.4
- Hann, David W.4
- Mcmahon, Robert Ormond3
- Meyer, Walter H. (Walter Huber)3
- United States. Forest Service. Pacific Northwest Region3
- Bruce, Donald, B. 18842
- Forest Research Council Of The Pacific Northwest2
- Hanus, Mark L.2
- Johnson, Norman E.2
- Marshall, David D.2
- Mcardle, Richard Edwin, 1899 2
- United States Pacific Northwest Forest And Range Experiment Station (Portland, Or.)2
- Achterman, Gail1