Subject
- Clam fisheries -- Oregon4
- Flatfish fisheries -- Oregon4
- Air -- Pollution -- Oregon3
- Environmental policy -- Oregon3
- Water -- Pollution -- Oregon3
- Beef cattle -- Breeding2
- Clamming -- Oregon2
- Fishery management -- Oregon2
- Forests and forestry -- Oregon2
- Lodgepole pine -- Diseases and pests -- Montana -- Gallatin National Forest2
- Logging, Skyline2
- Marine biology -- Oregon -- Netarts Bay2
- Mountain pine beetle -- Montana -- Gallatin National Forest2
- Natural areas – Oregon2
- Natural resources -- Oregon -- Netarts Bay2
- Nature conservation – Oregon2
- Netarts Bay (Or.)2
- Oregon. Natural Area Preserves Advisory Committee2
- Shellfish fisheries -- Oregon -- Management2
- Timber -- Oregon2