- Oregon State University. Agricultural Experiment Station65
- Oregon State College. Extension Service60
- Oregon State College. Agricultural Experiment Station50
- Oregon State Agricultural College. Agricultural Experiment Station13
- United States. Agricultural Research Service13
- Oregon Agricultural College. Experiment Station12
- Columbia Basin Agricultural Research Center11
- Oregon State College. Federal Cooperative Extension Service11
- Klamath County (Or.)8
- Kuhlman, G. W. (Gustav Wesley), 1894 7
- Gorton, W. W. (William Winfield), 1907 6
- Powers, W. L. (Wilbur Louis), 18876
- Besse, Ralph S. (Ralph Stephen), 1887 5
- Deloach, D. B. (Daniel Barton), 1904 5
- Oregon State University. Klamath Agricultural Experiment Station5
- Jackson County (Or.)4
- Bailey, Sam H.3
- Baker County (Or.)3
- Eastern Oregon Agricultural Research Center3
- Gish, Norville R.3