Creator
- Hannaway, D. B.1
- Mcguire, William S.1
- Oregon Agricultural College. Experiment Station1
- Oregon State Agricultural College. Agricultural Experiment Station1
- Oregon State University. Extension Service1
- Scudder, H. D. (Henry Desborough), 1881 1
- Selby, H. E. (Halbert Edgerton), 1896 1
- Youngberg, Harold Wayne, 1929 1