- Oregon Agricultural College. Experiment Station104
- Oregon State University87
- Oregon State Agricultural College. Agricultural Experiment Station86
- Oregon State University. Extension Service60
- Oregon State University. Agricultural Experiment Station42
- Oregon State University. Forest Research Laboratory38
- Oregon State College. Agricultural Experiment Station34
- Oregon State University. College Of Forestry28
- Potter, E. L. (Ermine Lawrence), 1884 20
- Oregon State College. Extension Service19
- Powers, W. L. (Wilbur Louis), 188718
- Hartman, Henry, 1889 14
- Robinson, R. H. (Reginald Heber), 1886 14
- United States. Forest Service13
- Hatfield Marine Science Center12
- Osu Forestry Alumni Association12
- Childs, Leroy, 1888 11
- Columbia Basin Agricultural Research Center11
- Graham, John Paul11
- United States. Agricultural Research Service11