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- Agriculture 64
- Oregon State University. Extension Service 16
- College buildings 11
- Teaching demonstrations 9
- Universities and colleges--Faculty 9
- Railroad cars 8
- Hops 7
- Harvesting 6
- Portraits, Group 6
- Agricultural laborers 5
- Portraits 5
- Poultry--Housing 5
- Brooder House 4
- Incubator Building 4
- Oregon State College. Agricultural Experiment Station 4
- Barns 3
- Mexican American agricultural laborers 3
- Pears 3
- Strawberries 3
- 4-H clubs 2
