- Oregon Agricultural College. Experiment Station107
- Forest Products Laboratory (U.S.)43
- Oregon State Agricultural College. Agricultural Experiment Station42
- Oregon Agricultural College. Extension Service36
- Oregon State College. Extension Service18
- Potter, E. L. (Ermine Lawrence), 1884 18
- Hartman, Henry, 1889 13
- Powers, W. L. (Wilbur Louis), 188711
- Robinson, R. H. (Reginald Heber), 1886 10
- Oregon State Agricultural College. Extension Service9
- Withycombe, Robert, 1880 9
- Hyslop, G. R. (George Robert), 1884 7
- Lovett, A. L. (Arthur Lester), 1885 19247
- Barss, H. P. (Howard Phillips), 1885 6
- Bullis, D. E. (Deloss Everett), 1894 19846
- Childs, Leroy, 1888 6
- Ritter, George J.6
- Schuster, C. E. (Carl Ephraim), 1889 6
- United States. Forest Service6
- Zeller, S. M. (Sanford Myron), 1885 19486