Subject
- Coastal ecology -- Oregon (State) -- Periodicals1
- Coastal ecology -- Washington (State) -- Periodicals1
- Denitrification1
- Hyporheic zones1
- Indians of North America -- Columbia River Basin1
- Nitrates -- Environmental aspects1
- Nitrogen cycle1
- Pacific Northwest Coastal Ecosystems Regional Study -- Periodicals1
- Petroglyphs -- Oregon -- Dalles1
- Stream chemistry1