Subject
- Aggregates (Building materials) -- Oregon1
- Cities -- Growth -- Environmental aspects -- Oregon -- Portland Metropolitan Area1
- Civic leaders -- Oregon -- Portland Metropolitan Area -- Attitudes1
- Civic leaders -- Washington (State) -- Vancouver Metropolitan Area -- Attitudes1
- Consumers' preferences -- Oregon -- Portland Metropolitan Area1
- Earthquakes -- Oregon -- Pacific Coast1
- Earthquakes -- Oregon -- Portland Area1
- Earthquakes -- Oregon -- Warner Valley1
- Land use -- Environmental aspects -- Oregon -- Multnomah County1
- Milk trade -- Oregon -- Portland Metropolitan Area1
- Radiocarbon dating -- Oregon -- Portland Area1
- River channels -- Oregon -- Kelley Creek (Multnomah County)1
- Sediment transport -- Oregon -- Kelley Creek (Multnomah County)1
- Sediments (Geology) -- Oregon -- Portland Area1
- Shipwrecks -- Pacific Coast (U.S.)1
- Submarine geology -- Pacific Coast (U.S.)1
- Sweaters1
- Urban forestry -- Oregon -- Portland Metropolitan Area -- Management -- Public opinion1
- Urban forestry -- Oregon -- Portland Metropolitan Area -- Public opinion1
- Urban forestry -- Washington (State) -- Vancouver Metropolitan Area -- Management -- Public opinion1