Subject
- Columbia Basin Agricultural Research Center -- Periodicals19
- Forests and forestry -- Northwest, Pacific18
- Agriculture -- Research -- Columbia River Watershed17
- U.S. International Biological Program. Coniferous Forest Biome17
- Forests and forestry -- Research -- Northwest, Pacific16
- Fishery management -- Oregon -- Statistics15
- Fish-culture -- Oregon -- Statistics14
- Fishing -- Oregon -- Statistics14
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)14
- Forests and forestry -- Oregon -- Measurement9
- Swine -- Oregon -- Congresses8
- Fish culture -- Oregon7
- Mineral industries -- Oregon7
- Natural gas -- Prospecting -- Oregon7
- Petroleum -- Prospecting -- Oregon7
- Tualatin River Watershed (Or.)7
- Beef cattle -- Oregon -- Congresses6
- Dissertations, Academic -- United States -- Bibliography -- Catalogs6
- Fisheries -- Oregon6
- Hydrography -- Oregon -- Pacific Coast6