- Oregon Agricultural College. Experiment Station60
- Forest Products Laboratory (U.S.)24
- Oregon State Agricultural College. Agricultural Experiment Station23
- Oregon State College. Extension Service22
- Oregon Agricultural College. Extension Service19
- Potter, E. L. (Ermine Lawrence), 1884 12
- Powers, W. L. (Wilbur Louis), 188711
- Hyslop, G. R. (George Robert), 1884 7
- Oregon State Agricultural College. Extension Service6
- Ritter, George J.6
- Withycombe, Robert, 1880 6
- Hartman, Henry, 1889 5
- Browne, F. L. (Frederick Lincoln), 1895 4
- Fleck, Louis Carl4
- Johnston, W. W. (William Waters), 1896 4
- Schoth, H. A. (Harry August), 1891 4
- Schuster, C. E. (Carl Ephraim), 1889 4
- Stephens, David E. (David Edmund), 1879 4
- Bullis, D. E. (Deloss Everett), 1894 19843
- Chidester, G. H.3