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- Mountains--Oregon 9
- Rivers--Oregon 9
- Universities and colleges--Faculty 7
- Lakes--Oregon 6
- Mountains 5
- Rocky Mountains 4
- Canyons 3
- Foote, Wilson H. 3
- Formations (Geology) 3
- Grain 3
- Oregon State University. Agricultural Experiment Station 3
- Croplands 2
- Forest fires 2
- Islands--Oregon 2
- Log cabins 2
- Peavy, George Wilcox, 1869-1951 2
- Prairies 2
- Waterfalls 2
- Aeronautics 1
- Agriculture 1