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Topic
- Rivers--Oregon 16
- Lichens 10
- Agriculture 8
- Dams 7
- Valleys 5
- Bridges 3
- Canyons 3
- Farm ownership 3
- Farm tenancy--Economic aspects 3
- Ranches--Oregon 3
- Cattle 2
- Fishways 2
- Forests and forestry 2
- Waterfalls 2
- Arnold, Chuck 1
- Barns 1
- Clover 1
- Farms--Oregon 1
- Fire lookout stations 1
- Forest fires--Prevention and control 1
