- Oregon State Agricultural College. Extension Service100
- Oregon Agricultural College. Extension Service96
- Oregon Agricultural College. Experiment Station72
- United States. Forest Service23
- Lovett, A. L. (Arthur Lester), 1885 192416
- Barss, H. P. (Howard Phillips), 1885 15
- Hyslop, G. R. (George Robert), 1884 10
- Oregon Pioneer Association. Reunion10
- Dryden, James, 1863 8
- Johnson, A. Grace8
- Bouquet, A. G. B. (Arthur George Bristow), 1885 7
- Robinson, R. H. (Reginald Heber), 1886 7
- Schuster, C. E. (Carl Ephraim), 1889 7
- Smith, Margery M.7
- United States. Department Of Agriculture7
- Cosby, H. E. (Hubert Elmer), 1887 6
- Fitts, Edward B.6
- Mote, Don C. (Don Carlos), 1887 6
- Zhang, Hui6
- Jamison, N. C. (Neal Clement), 1890 5