- Oregon State University. Cooperative Extension Service96
- Oregon State University. Agricultural Experiment Station46
- Oregon State University. Extension Service33
- Oregon. Forest Lands Research Center, Corvallis32
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)14
- Frasier, Roberta C.13
- Pacific Northwest Cooperative Extension12
- Oregon State College. Agricultural Experiment Station11
- Oregon State College. Federal Cooperative Extension Service11
- Upper Willamette Resource Conservation And Development Project10
- Oregon State University. Forest Research Laboratory8
- Jackman, E. R.7
- Jackman, E. R. (Edwin Russell), 1894 19677
- Strawn, Bernice7
- Demory, Darrell6
- Oregon. Fish Commission6
- Oregon. State Game Commission. Fishery Division6
- Every, R. W.5
- Macswan, Iain C.5
- Oregon State University. Federal Cooperative Extension Service5