Creator
- Oregon State University. Agricultural Experiment Station55
- Powers, W. L. (Wilbur Louis), 188744
- Oregon State College. Agricultural Experiment Station43
- Oregon State University. Extension Service43
- Forest Products Laboratory (U.S.)40
- Oregon State University40
- Oregon State College. Engineering Experiment Station28
- Oregon State University. Engineering Experiment Station26
- Oregon State College. Extension Service25
- Oregon Agricultural College. Experiment Station23
- Lane County Historical Society (Or.)21
- Oregon. Department Of Fish And Wildlife21
- Oregon State Agricultural College. Agricultural Experiment Station20
- United States. Forest Service20
- Et Al.18
- Oregon State University. College Of Forestry16
- Oregon State University. Forest Research Laboratory16
- Osu Forestry Alumni Association15
- Mockler, Todd C.14
- Pacific Northwest Vegetable Insect Conference14