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- Mountains--California 8
- Forests and forestry 5
- Shasta, Mount (Calif. : Mountain) 3
- Mountaineers 2
- Mountains 2
- Rocks 2
- Bohlman, Herman 1
- Civilian Conservation Corps (U.S.) 1
- Finley, William L. (William Lovell), 1876-1953 1
- Locomotives 1
- Log transportation 1
- Logging railroads 1
- Logging 1
- Nature 1
- Railroads 1
- Steam donkeys 1
- Timber 1
- Tree planting 1
- Trees 1