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- Forests and forestry 50
- Civilian Conservation Corps (U.S.) 15
- Forest fires--Prevention and control 15
- Camps 7
- Wildfires 6
- Lakes--Oregon 4
- Mountains--Oregon 4
- Ranger stations 4
- Fire lookout stations 3
- Rivers--Oregon 3
- Barracks 2
- Cutover lands 2
- Ponderosa pine 2
- Tillamook Burn, Or., 1933 2
- Trucks 2
- United States. Works Progress Administration 2
- Burning of land 1
- Footbridges 1
- Forest fires 1
- Forest rangers 1