- Oregon Agricultural College. Experiment Station36
- Forest Products Laboratory (U.S.)20
- Oregon State Agricultural College. Agricultural Experiment Station18
- Oregon Agricultural College. Extension Service10
- Oregon State College. Extension Service9
- Hartman, Henry, 1889 7
- Powers, W. L. (Wilbur Louis), 18875
- Potter, E. L. (Ermine Lawrence), 1884 4
- Browne, F. L. (Frederick Lincoln), 1895 3
- Johnston, W. W. (William Waters), 1896 3
- Oregon State Agricultural College. Extension Service3
- Oregon State College. Agricultural Experiment Station3
- Ritter, George J.3
- Selby, H. E. (Halbert Edgerton), 1896 3
- Brown, Gordon G. (Gordon George), 1887 2
- Bullis, D. E. (Deloss Everett), 1894 19842
- Chidester, G. H.2
- Dreesen, W. H. (William Henry), 1880 2
- Fulton, B. B. (Bentley Ball), 1889 2
- Haley, Robert Murkland2