- Oregon State University. Agricultural Experiment Station52
- Oregon State University. Extension Service15
- Bogart, Ralph, 1908 12
- Davidson, T. P.9
- Krueger, Hugo (Hugo Martin), 1902 7
- Ralston, A. T.6
- Ralston, A. T. (Allen Thurman), 1915 6
- Oregon State College. Agricultural Experiment Station5
- Frischknecht, W. Dean4
- Pirelli, Gene J.4
- Alexander, G. I. (Graham Irving)3
- Eastern Oregon Experiment Station (Union, Or.)3
- Hoornbeek, Frank K. (Frank Kent), 1928 3
- O'connor, Carl W.3
- Potter, E. L. (Ermine Lawrence), 1884 3
- Raleigh, Robert J.3
- Taylor, Norton O.3
- van Arsdel, William C. (William Campbell), 1920 3
- Wallace, Joe D.3
- Alexander, Graham Irving2