Subject
- Sea level -- Oregon75
- Wetlands -- Oregon75
- Wetland mapping -- Oregon74
- Coast changes -- Social aspects73
- Human beings -- Effect of environment on73
- Estuaries -- Oregon48
- Agricultural pests -- Control -- Congresses19
- Coos Bay Estuary (Or.)6
- Dairy cattle -- Feeding and feeds5
- Milk yield5
- Soft wheat -- Varieties -- Northwest, Pacific5
- Winter wheat -- Varieties -- Northwest, Pacific5
- Nutrition -- Study and teaching (Elementary)4
- U.S. International Biological Program. Coniferous Forest Biome4
- Alsea River Estuary (Or.)3
- Chetco River Estuary (Or.)3
- Coquille River Estuary (Or.)3
- Dairying3
- Elk River (Or. : River)3
- Expanded Food and Nutrition Education Program (U.S.)3