- Oregon State College. Agricultural Experiment Station29
- Oregon State Agricultural College. Agricultural Experiment Station12
- Oregon State College. Extension Service11
- Oregon State College. Federal Cooperative Extension Service5
- Fore, R. E. (Robert Estes), 1907 4
- Forest Products Laboratory (U.S.)4
- Oregon Federal Writers' Project4
- Oregon Historical Records Survey4
- Oregon. Fish Commission4
- Edwards, F. M. (Floyd Marven), 1899 3
- Johnson, R. P. A. (Robert Pilson Albert), 1888 3
- Pacific Northwest Forest Experiment Station (Portland, Or.)3
- Potter, E. L. (Ermine Lawrence), 1884 3
- Powers, W. L. (Wilbur Louis), 18873
- Schoth, H. A. (Harry August), 1891 3
- Wiegand, Ernest Herman, 1886 3
- Withycombe, Robert, 1880 3
- Besse, Ralph S. (Ralph Stephen), 1887 2
- Burrier, A. S. (Arnold Stewart), 1902 19382
- Civilian Conservation Corps (U.S.)2