Subject
- Agricultural pests -- Control -- Congresses12
- U.S. International Biological Program. Coniferous Forest Biome6
- Beets -- Diseases and pests -- Control -- Oregon4
- Beets -- Diseases and pests -- Nutritional aspects -- Oregon4
- Barred owl -- Reproduction3
- Columbia River3
- Northern spotted owl -- Reproduction3
- Ocean currents -- Pacific Coast (Or.) -- Observations3
- Ocean temperature -- Pacific Coast (Or.) -- Measurement3
- Airplanes -- Wings2
- Boron in plant nutrition -- Oregon2
- Carbon cycle (Biogeochemistry) -- Mathematical models2
- Celery -- Diseases and pests -- Control -- Oregon2
- Celery -- Diseases and pests -- Nutritional aspects -- Oregon2
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley2
- Conifers -- West (U.S.) -- Ecology2
- Fish populations -- Oregon2
- Fisheries -- Oregon2
- Flatfish fisheries -- Oregon2
- Flatfishes -- Oregon2