Subject
- Forest fires -- Oregon1
- Forest fires -- Oregon -- Prevention and control1
- Forest fires -- Washington (State)1
- Forest fires -- Washington (State) -- Prevention and control1
- Forest insects -- Oregon1
- Forest insects -- Washington (State)1
- Forest management -- Oregon1
- Forest management -- Washington1
- Forests and forestry -- Columbia River Region -- Measurement1
- Forests and forestry -- Oregon1
- Forests and forestry -- Oregon -- Measurement1
- Forests and forestry -- Washington1
- Forests and forestry -- Washington (State) -- Klickitat River Region1
- Forests and forestry -- Washington (State) -- Measurement1
- Lodgepole pine -- Diseases and pests -- Oregon1
- Lodgepole pine -- Diseases and pests -- Washington (State)1
- Lodgepole pine -- Washington (State) -- Wenatchee National Forest1
- Ponderosa pine -- Washington (State) -- Klickitat River Region1
- United States. National Industrial Recovery Act of 19331