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- Architecture, American 53
- Architecture--United States 53
- Croplands 19
- Potatoes 11
- Birds--Nests 10
- Universities and colleges--Employees 10
- Universities and colleges--Faculty 10
- Weasels 10
- Stilts (Birds) 9
- Agricultural experiment stations 8
- Klamath County Museum 8
- Grain 7
- Lumber trade 7
- Skunks 7
- Birds--Eggs 6
- Owls 6
- Sawmills 6
- Strigidae 6
- Alfalfa 5
- Cities and towns 5