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- Universities and colleges--Faculty 6
- Agricultural experiment stations 5
- Oregon State University. Extension Service 5
- Portraits, Group 5
- Potatoes 5
- Croplands 4
- Gross, Alvin Eugene 4
- School of Agriculture 4
- Bankers 3
- First National Bank of Oregon 3
- Plants--Frost protection 3
- Sprinklers 3
- Agriculture 2
- Alfalfa 2
- Food processing plants--Equipment and supplies 2
- Irrigation 2
- Klamath Falls (Or.) 2
- College buildings 1
- Farms 1
- Oregon Institute of Technology (Klamath Falls, Or.) 1
