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- Oregon State University. Extension Service3,612
- Oregon State University. Agricultural Experiment Station1,219
- Oregon State College. Agricultural Experiment Station895
- Oregon State College. Federal Cooperative Extension Service731
- Oregon State University. Cooperative Extension Service362
- Oregon Agricultural College. Experiment Station252
- Pacific Northwest Cooperative Extension226
- Oregon State Agricultural College. Extension Service210
- Oregon Agricultural College. Extension Service200
- Oregon State Agricultural College. Agricultural Experiment Station171
- United States. Department Of Agriculture168
- Oregon State University. Forest Research Laboratory144
- Washington State University. Cooperative Extension132
- Oregon State University125
- Bouquet, A. G. B. (Arthur George Bristow), 1885 121
- Oregon State College. Extension Service114
- University Of Idaho. Cooperative Extension Service113
- Washington State University. Extension105
- Oregon State University. Extension Service/Marine Advisory Program94
- University Of Idaho. Extension92