- Oregon State University. Federal Cooperative Extension Service18
- Oregon State College. Federal Cooperative Extension Service12
- Oregon State University. Agricultural Experiment Station9
- Southern Oregon Agricultural Experiment Station9
- Every, R. W.8
- Westigard, Peter H.7
- Macswan, Iain C.6
- Oregon State University. Cooperative Extension Service5
- Warren, Rex5
- Crabtree, Garvin4
- Crowell, H. H. (Hamblin Howes), 1913 2
- Duncan, A. A.2
- Knapp, Stuart E.2
- Landforce, Andrew S.2
- Lee, J. S.2
- Lindsay, R. C.2
- Parker, Jesse Elmer, 1911 2
- Shearer, Marvin N.2
- Smith, Dean H.2
- Voris, C. Ralph2