- Oregon Agricultural College. Extension Service124
- Forest Products Laboratory (U.S.)87
- Oregon State Agricultural College. Extension Service79
- Oregon Agricultural College. Experiment Station66
- Oregon Agricultural College. Extension Division22
- Dryden, James, 1863 18
- Bouquet, A. G. B. (Arthur George Bristow), 1885 14
- Lewis, C. I. (Claude Isaac), 1880 192414
- Oregon Agricultural College11
- Lovett, A. L. (Arthur Lester), 1885 192410
- Samson, George R. (George Roy), 1879 9
- Barss, H. P. (Howard Phillips), 1885 8
- Potter, E. L. (Ermine Lawrence), 1884 8
- Scudder, H. D. (Henry Desborough), 1881 8
- Calvin, Henrietta W.7
- Kraus, E. J. (Ezra Jacob), 1885 7
- Reynolds, Ralph Elmer7
- United States. Forest Service7
- Barr, W. A.6
- Brown, W. S. (Walter Sheldon), 1878 6