Subject
- Douglas fir33
- Forests and forestry -- Measurement16
- Forests and forestry -- Oregon13
- Lumber -- Drying12
- Forests and forestry9
- Forest management8
- Douglas fir -- Drying7
- Forest fires -- Prevention and control7
- Lumber trade -- Northwest, Pacific7
- Wood waste -- Recycling7
- Forestry schools and education5
- United States. Forest Service5
- Wood -- Preservation5
- Forest reserves -- United States4
- Forests and forestry -- Oregon -- Measurement4
- Hardwoods -- Oregon4
- Log transportation4
- Logging4
- Logging -- Northwest, Pacific4
- Lumber trade -- Oregon4