Subject
- Economics -- Societies, etc.3
- Forest reserves -- United States -- History2
- Hydrology -- Research -- Oregon2
- United States. Forest Service -- History2
- Water resources development -- Oregon2
- Adult education -- India -- Orissa1
- Bees -- North America1
- Bees -- North America -- Morphology1
- Biology -- Study and teaching1
- Blister rust -- Control -- United States1
- Champoeg (Or.)1
- Clark, Ava Milam, 1884-19761
- Columbia River -- Recreational use1
- Commons, John R. (John Rogers), 1862-19451
- Conifers -- West (U.S.) -- Ecology1
- Decision-making1
- Douglas fir1
- Eight Dollar Mountain (Or.)1
- Entomology1
- Fisheries -- Columbia River1