- Oregon Agricultural College. Experiment Station124
- Oregon Agricultural College. Extension Service88
- Oregon Agricultural Experiment Station45
- Oregon State Agricultural College. Extension Service34
- Forest Products Laboratory (U.S.)22
- United States. Division Of Forestry21
- Oregon State College. Extension Service20
- Lewis, C. I. (Claude Isaac), 1880 192418
- Oregon State Agricultural College. Agricultural Experiment Station16
- United States. Forest Service16
- Hopkins, A. D. (Andrew Delmar), 1857 194814
- Barss, H. P. (Howard Phillips), 1885 13
- Dryden, James, 1863 13
- Oregon State Agricultural College13
- Bouquet, A. G. B. (Arthur George Bristow), 1885 12
- Oregon Agricultural College. Extension Division12
- Oregon State Agricultural College. Experiment Station12
- Potter, E. L. (Ermine Lawrence), 1884 12
- Lovett, A. L. (Arthur Lester), 1885 192411
- Hyslop, G. R. (George Robert), 1884 10