- Oregon State University. Agricultural Experiment Station43
- Oregon State University. Malheur Experiment Station18
- Fitch, Luther14
- Oregon State University. Extension Service11
- Columbia Basin Agricultural Research Center5
- Crabtree, Garvin5
- Gardner, Ernest Hugh5
- Jackson, T. L. (Thomas Lloyd), 1922 5
- Johnson, Malcolm5
- Oregon State University. Forest Research Laboratory5
- Osu Forestry Alumni Association5
- Wilcox, Bert G.5
- Gardner, E. Hugh4
- Holst, David4
- Jackson, T. L.4
- Liston, Aaron4
- Oregon State Agricultural College. Agricultural Experiment Station4
- Oregon State College. Agricultural Experiment Station4
- Oregon. Fish Commission4
- Pacific Northwest Insect Management Conference4