- Oregon State Agricultural College. Agricultural Experiment Station143
- Oregon Agricultural College. Experiment Station132
- Oregon State College. Agricultural Experiment Station82
- Oregon State University44
- Powers, W. L. (Wilbur Louis), 188726
- Potter, E. L. (Ermine Lawrence), 1884 24
- Oregon State University. Agricultural Experiment Station20
- Hartman, Henry, 1889 17
- Robinson, R. H. (Reginald Heber), 1886 17
- Lane County Historical Society (Or.)14
- Lane County Pioneer Historical Society (Or.)14
- Wilster, G. H. (Gustav Hans), 189314
- Wiegand, Ernest Herman, 1886 12
- Besse, Ralph S. (Ralph Stephen), 1887 11
- Childs, Leroy, 1888 11
- Geyer, Nancy A.11
- Oregon State University. Extension Service11
- Withycombe, Robert, 1880 11
- Jones, I. R. (Idwal Ralph), 1898 10
- Oregon State College. Extension Service10