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- Architecture, American 75
- Architecture--United States 75
- Indians of North America 38
- outdoor candid portraits 31
- Pendleton Round-Up 25
- Universities and colleges--Faculty 24
- Croplands 21
- Horses 19
- Rodeos 19
- Agricultural experiment stations 17
- Umatilla Branch Experiment Station 17
- Wheat 14
- Columbia Basin Agricultural Research Center 11
- Oregon State University. Extension Service 10
- Parades & processions 10
- Tipis 10
- Cowboys 9
- Rohde, Charles R. 8
- Portraits 7
- Boards of directors 6
