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Topic
- Log transportation 237
- Logging 166
- Lumber trade 148
- Timber 122
- Forests and forestry 84
- Loggers 72
- Trees 62
- Natural resources 58
- Logging railroads 41
- Rivers 39
- Railroads 35
- Timber--Rafting 34
- Log driving 30
- Railroad tracks 30
- Waterways 27
- Docks 25
- Railroad trains 25
- Hoisting machinery 22
- Lumber 22
- Oxen 16
