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- Forests and forestry 158
- Civilian Conservation Corps (U.S.) 102
- Lumber trade 98
- Portraits, Group 92
- Rivers--Oregon 89
- Camps 76
- Springs 46
- Mountains--Oregon 41
- Logging 39
- Roads 36
- Log transportation 34
- Forest fires--Prevention and control 32
- Waterfalls 28
- Agriculture 26
- Cities and towns 26
- Lakes--Oregon 22
- Mountaineering 20
- Mountains--Washington (State) 19
- Fishing 18
- Lodging-houses 17