Subject
- Consumer education2
- Excavations (Archaeology) -- Oregon -- Mission Lake Region2
- Methodist Episcopal Church -- Oregon2
- Adjustment (Psychology) in children -- Oregon1
- Aerofoils1
- Agricultural chemicals -- Environmental aspects -- Oregon -- Lane County1
- Agricultural education -- Oregon1
- Agricultural pollution -- Management -- Oregon -- Tualatin River Watershed1
- Agroforestry systems -- Oregon -- Corvallis1
- Animal culture -- Environmental aspects -- Oregon -- Tualatin River Watershed1
- Animated television programs1
- Antiquities, Prehistoric -- Idaho -- Owyhee County1
- Antiquities, Prehistoric -- Oregon -- North Santiam River Watershed1
- Aquifers -- Management -- Law and legislation -- North America1
- Aquifers -- Management -- North America1
- Archaeological geology -- Oregon -- Upper Klamath Lake Watershed1
- Archaeological surveying -- Oregon -- North Santiam River Watershed1
- Artificial satellites in forestry1
- Atmospheric carbon dioxide -- Environmental aspects -- California, Northern1
- Atmospheric carbon dioxide -- Environmental aspects -- Oregon1