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- Oregon State University. Extension Service 5
- Universities and colleges--Faculty 4
- Agriculture 2
- Laboratories 2
- Butts, Joseph Shirey 1
- Calvert, Leonard 1
- Chemistry 1
- Cowan, J. Ritchie (John Ritchie) 1
- Fur 1
- Irrigation 1
- Minks 1
- Onions 1
- Portraits 1
- Sandine, William E., 1928- 1