Subject
- Douglas fir12
- Forests and forestry -- Measurement8
- Forest fires -- Prevention and control7
- Lumber trade -- Northwest, Pacific7
- Wood waste -- Recycling7
- Forests and forestry6
- United States. Forest Service5
- Forest management4
- Forest reserves -- United States4
- Log transportation4
- Logging4
- Logging -- Northwest, Pacific4
- Western hemlock4
- Wooden-frame houses4
- Aeronautics in forest fire control3
- Building, Wooden3
- Caterpillar tractors3
- Chain saws3
- Forest fires -- Oregon -- Prevention and control3
- Forest influences3