- Oregon State University. Extension Service8
- Oregon State College. Agricultural Experiment Station6
- Gamroth, Michael J.5
- Selby, H. E. (Halbert Edgerton), 1896 4
- Adams, H. P. (Holyoke Purinton), 1922 3
- Bodyfelt, F. W. (Floyd W.), 1937 3
- Burrier, A. S. (Arnold Stewart), 1902 19383
- Brandt, P. M. (Philip Martin), 1888 2
- Pacific Northwest Cooperative Extension2
- University Of Idaho. Cooperative Extension System2
- Washington State University. Cooperative Extension2
- Anderson, D. E. (Donald Eugene)1
- Anderson, Donald E.1
- Bennett, William Riley1
- Blanch, Grant E. (Grant Etherington), 1915 1
- Boyd, Louis D.1
- Byers, John Harkness, 1918 1
- Cleveland, George W.1
- Crane, Stuart R.1
- Drew, John Leo1