- Oregon State College. Federal Cooperative Extension Service16
- Bouquet, A. G. B. (Arthur George Bristow), 1885 7
- Oregon Agricultural College. Extension Service7
- Oregon. Department Of Fish And Wildlife7
- Jackman, E. R. (Edwin Russell), 1894 6
- Oregon State Agricultural College. Extension Service6
- Hyslop, G. R. (George Robert), 1884 5
- Oregon State University. Department Of Horticulture5
- Oregon. State Game Commission5
- United States. Forest Service5
- Mckay, M. B. (Marion Bertice), 1887 4
- Oregon State University. College Of Forestry4
- Pacific Northwest Insect Management Conference4
- Jenkins, Lawrence3
- Oregon Agricultural College. Experiment Station3
- Oregon State University. Agricultural Experiment Station3
- Oregon State University. Malheur Experiment Station3
- United States. Forest Service. Pacific Northwest Region3
- Warren, Rex3
- Brown, Melanie2