- Oregon State College. Agricultural Experiment Station28
- Oregon State College. Extension Service11
- Oregon State Agricultural College. Agricultural Experiment Station5
- Fore, R. E. (Robert Estes), 1907 4
- Forest Products Laboratory (U.S.)4
- Oregon Federal Writers' Project4
- Oregon Historical Records Survey4
- Oregon State College. Federal Cooperative Extension Service4
- Oregon. Fish Commission4
- Johnson, R. P. A. (Robert Pilson Albert), 1888 3
- Powers, W. L. (Wilbur Louis), 18873
- Wiegand, Ernest Herman, 1886 3
- Besse, Ralph S. (Ralph Stephen), 1887 2
- Civilian Conservation Corps (U.S.)2
- Kuhlman, G. W. (Gustav Wesley), 1894 2
- Muth, O. H. (Otto Herbert), 1906 2
- Richards, D. E. (Dale Everette), 1892 2
- Scullen, Herman A. (Herman Austin), 1887 2
- Seghetti, L. (Libero), 1909 2
- Shaw, J. N. (James Niven), 1890 2