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Topic
- Log transportation 327
- Lumber trade 237
- Logging 174
- Timber 122
- Forests and forestry 85
- Loggers 72
- Trees 62
- Natural resources 58
- Logging railroads 41
- Rivers 39
- Railroads 35
- Timber--Rafting 34
- Railroad tracks 31
- Log driving 30
- Waterways 27
- Railroad trains 26
- Docks 25
- Railroad cars 25
- Hoisting machinery 22
- Lumber 22
