Subject
- Forests and forestry -- United States -- Bibliography3
- Columbia River2
- Forest policy -- United States -- Bibliography2
- Forest reserves -- United States -- Bibliography2
- Radioactive pollution of water -- Columbia River2
- Radioecology -- Columbia River2
- United States. Forest Service -- Bibliography2
- Agriculture -- Research -- Columbia River Watershed1
- Alsea River Watershed (Or.)1
- Aquatic ecology1
- Archaeology and history -- Washington (State) -- Vancouver1
- Champoeg (Or.)1
- Chinook salmon1
- Clark County (Wash.) -- History -- Chronology1
- Clark, Ava Milam, 1884-19761
- Coasts -- Oregon1
- Colorado -- History1
- Columbia Basin Agricultural Research Center -- Periodicals1
- Commons, John R. (John Rogers), 1862-19451
- Dissertations, Academic -- United States -- Bibliography1