- Oregon Agricultural College. Experiment Station27
- Oregon Agricultural College. Extension Service19
- Lewis, C. I. (Claude Isaac), 1880 19246
- Forest Products Laboratory (U.S.)5
- Gardner, Victor Ray, 1885 4
- Lovett, A. L. (Arthur Lester), 1885 19244
- Oregon Agricultural College4
- Powers, W. L. (Wilbur Louis), 18874
- Barss, H. P. (Howard Phillips), 1885 3
- Magness, J. R. (John Robert), 1894 3
- Potter, E. L. (Ermine Lawrence), 1884 3
- Scudder, H. D. (Henry Desborough), 1881 3
- United States. Forest Service3
- Brown, W. S. (Walter Sheldon), 1878 2
- Cate, C. C. (Claude Clifton), 1882 2
- Johnson, A. Grace2
- Kraus, E. J. (Ezra Jacob), 1885 2
- Oregon Agricultural College. Department Of College Extension2
- Oregon Agricultural College. Extension Division2
- Oregon State Agricultural College. Extension Service2