- Oregon Agricultural College. Extension Service11
- Fitts, Edward B.6
- Oregon State College. Federal Cooperative Extension Service6
- Barr, W. A.5
- Ewalt, H. P.4
- Oregon State University. Agricultural Experiment Station4
- Oregon State University. Extension Service4
- Jamison, N. C. (Neal Clement), 1890 3
- Oregon Agricultural College. Extension Division3
- Claypool, Donald W., 1929 2
- Gangwer, Michael I.2
- Graham, Monte2
- Graves, R. R.2
- Jones, I. R. (Idwal Ralph), 1898 2
- Adams, Frank William1
- Ballerstedt, Peter John, 1956 1
- Bone, Jesse F. (Jesse Franklin), 1916 1
- Breithaupt, L. R. (Le Roy), 1886 1
- Cannon, Lynn E.1
- Conklin, Melvin J.1