- Oregon Agricultural College. Experiment Station13
- Oregon State University. Extension Service13
- Oregon. Dept. Of Geology And Mineral Industries13
- Oregon State College. Agricultural Experiment Station11
- Dalton, Meghan10
- Oregon State University. Agricultural Experiment Station10
- Rupp, David10
- Oregon State Agricultural College. Agricultural Experiment Station9
- Hawkins, Linnia7
- Besse, Ralph S. (Ralph Stephen), 1887 6
- Institute For Natural Resources6
- Oregon State University. Forest Research Laboratory5
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)5
- Powers, W. L. (Wilbur Louis), 18875
- Eastern Oregon Agricultural Research Center4
- Peterson, Norman V.4
- Scudder, H. D. (Henry Desborough), 1881 4
- United States. Forest Service4
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club4
- Fleishman, Erica3