Subject
- Agricultural pests -- Control -- Congresses6
- Barred owl -- Reproduction3
- Forests and forestry -- Oregon -- Measurement -- Mathematical models3
- Northern spotted owl -- Reproduction3
- Aerial photography2
- American wood2
- Fish populations -- Oregon -- Pacific Coast2
- Forest insects -- Control -- Oregon2
- Forest insects -- Oregon2
- Forests and forestry -- Oregon -- Measurement2
- Habitat (Ecology)2
- Hazelnuts -- Varieties2
- Land cover2
- Marine animals -- Oregon -- Pacific Coast -- Geographical information2
- Marine fishes -- Oregon -- Pacific Coast2
- Oregon -- Heceta Bank2
- Salmon -- Effect of habitat modification on -- Oregon2
- Salmon -- Effect of sediments on -- Oregon2
- Sand and gravel industry -- Environmental aspects -- Oregon2
- Stream ecology -- Oregon2