- Oregon State University. Extension Service528
- Oregon State College. Agricultural Experiment Station484
- Oregon State College. Federal Cooperative Extension Service127
- Oregon State University. Agricultural Experiment Station110
- Oregon State University. Cooperative Extension Service100
- Mote, Don C. (Don Carlos), 1887 49
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)45
- Oregon Agricultural College. Experiment Station37
- United States. Department Of Agriculture32
- Koester, Ardis W.29
- Mcwhorter, Frank, 1896 198529
- Pacific Northwest Cooperative Extension29
- Bedell, Thomas E.24
- Bouquet, A. G. B. (Arthur George Bristow), 1885 23
- Washington State University. Cooperative Extension22
- Fisher, Glenn C.20
- Moravets, F. L.20
- Owens, Charles Elmer, 1877 20
- University Of Idaho. Cooperative Extension Service20
- Morrow, Alice Mills19