Subject
- Best management practices (Pollution prevention) -- Oregon -- Willamette River Valley -- Citizen participation1
- Farmers -- Oregon -- Willamette River Valley -- Attitudes1
- Fish populations -- Klamath River (Or. and Calif.)1
- Groundwater -- Pollution -- Oregon -- Willamette River Valley -- Prevention -- Citizen participation1
- Karok Indians -- Oregon -- Interviews1
- Karok Indians -- Oregon -- Social life and customs1
- Lampreys -- Ecology -- Klamath River (Or. and Calif.)1
- Nitrates -- Environmental aspects -- Oregon -- Willamette River Valley1
- Water -- Pollution -- Oregon -- Willamette River Valley -- Prevention -- Citizen participation1
- Water quality -- Oregon -- Willamette River Valley1
- Yurok Indians -- Oregon -- Interviews1
- Yurok Indians -- Oregon -- Social life and customs1