- Oregon State University. Forest Research Laboratory24
- Hann, David W.23
- Oregon State University. Extension Service12
- Bowers, S. (Steven Clay)9
- U.S. International Biological Program. Coniferous Forest Biome8
- Hanus, Mark L.7
- University Of Washington7
- United States. Forest Service5
- Marshall, David D.4
- Ritchie, Martin W.4
- Fritschen, Leo3
- Reeb, J. E. (James Edmund), 1951 3
- Walters, David K.3
- Bell, John F.2
- Bruce, Donald, B. 18842
- Coleman, Nate2
- Graves, Henry Solon, 1871 19512
- Larsen, David R.2
- Mcardle, Richard Edwin, 1899 2
- Meyer, Walter H. (Walter Huber)2