Subject
- Forests and forestry -- Washington (State) -- Statistics43
- Forests and forestry -- Washington (State)42
- Forest surveys -- Washington (State)40
- Forests and forestry -- Oregon40
- Forest surveys -- Oregon39
- Forests and forestry -- Oregon -- Statistics39
- Forests and forestry -- Northwest, Pacific29
- Forests and forestry -- Research -- Northwest, Pacific25
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)25
- Forestry research -- Northwest, Pacific2
- Forests and forestry -- Northwest, Pacific -- Periodicals2
- Forests and forestry -- Research -- Northwest, Pacific -- Periodicals2
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.) -- Periodicals2
- Bark1
- Bark beetles -- Control -- Oregon -- Pringle Falls Experimental Forest.1
- Bighorn sheep -- Oregon -- Habitat1
- Douglas fir -- Grading -- Oregon1
- Douglas fir -- Losses1
- Experimental forests -- Oregon -- H.J. Andrews Experimental Forest1
- Forest landowners -- Oregon -- Statistics1