- Forests and forestry -- Northwest, Pacific[remove]31
- United States. Forest Service. Pacific Northwest Region22
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club22
- Forests and forestry -- Research -- Northwest, Pacific3
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)3
- Carbon cycle (Biogeochemistry) -- Northwest, Pacific1
- Forest ecology -- Northwest, Pacific1
- Forest management -- Environmental aspects -- Northwest, Pacific1
- Forest policy1
- Forest products industry -- Law and legislation -- United States1
- Forests and forestry -- Economic aspects -- Northwest, Pacific1
- Forests and forestry -- Multiple use1
- Habitat (Ecology)1
- Lumber trade -- United States1
- Northern spotted owl -- Northwest, Pacific1
- Old growth forests -- Government policy -- Northwest, Pacific1
- Old growth forests -- Northwest, Pacific1
- Starker lectures1
- Western Forestry and Conservation Association1
- Wildlife conservation -- Northwest, Pacific1