- Oregon State College. Agricultural Experiment Station207
- Forest Products Laboratory (U.S.)169
- Oregon State Agricultural College. Agricultural Experiment Station125
- Oregon State Agricultural College. Extension Service100
- Oregon State College. Federal Cooperative Extension Service82
- Bouquet, A. G. B. (Arthur George Bristow), 1885 43
- Pacific Northwest Forest Experiment Station (Portland, Or.)34
- Mote, Don C. (Don Carlos), 1887 31
- Oregon State College. Extension Service29
- Cowgill, Helen Julia23
- Oregon Federal Writers' Project21
- Oregon Historical Records Survey21
- Powers, W. L. (Wilbur Louis), 188717
- Mcwhorter, Frank, 1896 198516
- Zeller, S. M. (Sanford Myron), 1885 194815
- Burrier, A. S. (Arnold Stewart), 1902 193814
- Jones, I. R. (Idwal Ralph), 1898 14
- Schuster, C. E. (Carl Ephraim), 1889 13
- Selby, H. E. (Halbert Edgerton), 1896 13
- United States. Forest Service13