- Oregon State University. Agricultural Experiment Station75
- Oregon State University59
- Smith, Robert L. (Robert Lloyd), 1935 54
- Oregon State University. Extension Service52
- Huyer, Adriana, 1945 47
- Oregon State College. Extension Service42
- Jackson, T. L. (Thomas Lloyd), 1922 40
- Kosro, P. Michael, 1951 35
- Fleischbein, Jane31
- Wheeler, Patricia A.29
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club23
- Peterson, W. T.20
- Barth, Jack A.19
- Gardner, Ernest Hugh19
- Oregon. Dept. Of Geology And Mineral Industries16
- Oregon State College. Agricultural Experiment Station15
- Oregon. State Game Commission15
- Oregon State University. College Of Forestry14
- Osu Forestry Alumni Association14
- Et Al.13