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- Agriculture 5
- Architecture, American 14
- Architecture--United States 14
- Clover 4
- Coarse woody debris 14
- Croplands 2
- Dawson, Murray 1
- Deers 1
- Douglas County (Or.) 1
- Drilling and boring 1
- Farm ownership 5
- Farm tenancy--Economic aspects 5
- Farms--Oregon 5
- Fertilizers 1
- Fire 1
- Forest fires 7
- Incinerators 3
- Jackson, T. L. (Thomas Lloyd), 1922- 1
- Mosher, Wayne Delbert 3
- Mountains 2