Subject
- Forest fires -- Prevention and control9
- Lumber trade -- Northwest, Pacific6
- Douglas fir4
- Forest reserves -- United States -- Recreational use4
- Forest fires -- Oregon -- Prevention and control3
- Lumber trade3
- Radio in agriculture3
- Aerial photogrammetry2
- Aeronautics in forest fire control2
- Aeronautics in forestry2
- Bark -- Utilization2
- Building, Wooden2
- Cascara2
- Communication in forestry2
- Cutover lands -- Oregon -- Clatsop County2
- Forest fire fighters2
- Forest fires -- Northwest, Pacific -- Prevention and control2
- Forest fires -- Prevention and control -- Study and teaching2
- Forest management2
- Forest management -- Northwest, Pacific2