Subject
- Lane County (Or.) -- History48
- Forests and forestry -- Northwest, Pacific24
- United States. Forest Service. Pacific Northwest Region18
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club18
- Forests and forestry -- Oregon12
- Oregon State University. College of Forestry10
- Oregon -- History9
- Mineral industries -- Oregon7
- Natural gas -- Prospecting -- Oregon7
- Petroleum -- Prospecting -- Oregon7
- Cascade Range -- Environmental conditions5
- Insects -- Northwest, Pacific5
- Nature conservation -- Washington (State)5
- North Cascades Conservation Council5
- United States. Forest Service5
- Wilderness areas -- Washington (State)5
- Beetles -- Northwest, Pacific4
- Forests and forestry -- Research -- Northwest, Pacific4
- Forests and forestry -- United States -- Bibliography4
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)4