Subject
- Mineral industries -- Oregon10
- Game and game-birds -- Oregon9
- Game protection -- Oregon9
- Natural gas -- Prospecting -- Oregon8
- Petroleum -- Prospecting -- Oregon8
- Earthquakes -- Oregon -- Portland4
- Fish culture -- Oregon4
- Fisheries -- Oregon4
- Fishery management -- Oregon -- Statistics4
- Oceanography -- Oregon -- Umpqua River Estuary4
- Umpqua River Estuary (Or.)4
- Fish-culture -- Oregon -- Statistics3
- Fishing -- Oregon -- Statistics3
- Continental shelf -- Oregon2
- Dissertations, Academic -- United States -- Bibliography -- Catalogs2
- Geology -- Hells Canyon (Idaho and Or.)2
- Geology -- Oregon -- Field work2
- Geology -- Oregon -- Jefferson County2
- Geology, Stratigraphic -- Miocene2
- Gold -- Economic aspects2