- Oregon Agricultural College. Experiment Station208
- Oregon Agricultural College. Extension Service121
- Forest Products Laboratory (U.S.)83
- Oregon Agricultural Experiment Station82
- Oregon State Agricultural College. Extension Service72
- Potter, E. L. (Ermine Lawrence), 1884 25
- Lewis, C. I. (Claude Isaac), 1880 192423
- Oregon State College. Extension Service23
- United States. Division Of Forestry23
- Dryden, James, 1863 22
- United States. Forest Service22
- Oregon State Agricultural College. Agricultural Experiment Station20
- Hopkins, A. D. (Andrew Delmar), 1857 194818
- Powers, W. L. (Wilbur Louis), 188718
- Shaw, G. W. (George Wright), 1864 16
- Oregon Agricultural College. Extension Division15
- Sproles, Eric14
- Bouquet, A. G. B. (Arthur George Bristow), 1885 13
- French, H. T. (Hiram Taylor), 1862 13
- Mote, Don C. (Don Carlos), 1887 13