- Oregon State University. Agricultural Experiment Station400
- Oregon State University. Malheur Experiment Station40
- Columbia Basin Agricultural Research Center34
- United States. Agricultural Research Service33
- United States. Agency For International Development21
- Klamath County (Or.)17
- Oregon State University. Klamath Agricultural Experiment Station17
- Central Oregon Agricultural Research Center10
- International Maize And Wheat Improvement Center10
- Eastern Oregon Agricultural Research Center9
- Southern Oregon Agricultural Experiment Station9
- Mack, H. J.8
- Frazier, W. A.7
- Brown, William G. (William Galen)6
- Mellenthin, Walter M., 1920 6
- Boersma, L.5
- Central Oregon Agricultural Experiment Station5
- Compton, O. C. (Oliver Cecil), 1903 5
- Crowell, H. H.5
- Harward, M. E.5