- Oregon State University94
- Oregon State University. Agricultural Experiment Station84
- Oregon State University. Extension Service79
- Cross, Timothy L.37
- Oregon State College. Agricultural Experiment Station37
- Oregon State College. Extension Service30
- Barth, John A.25
- Oregon Agricultural College. Experiment Station24
- Oregon. Employment Division24
- Cowles, Timothy J.23
- Oregon State University. College Of Forestry20
- Oregon State Agricultural College. Agricultural Experiment Station19
- Pacific Northwest Insect Management Conference17
- Boyd, Timothy John, 1958 201315
- Delcurto, Timothy15
- Oregon. State Game Commission. Fishery Division15
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)15
- Klamath County (Or.)14
- Powers, W. L. (Wilbur Louis), 188714
- Thorpe, Jim14