- Agriculture -- Research -- Oregon, Central -- Periodicals15
- Field experiments -- Oregon, Central -- Periodicals15
- Central Oregon Agricultural Research Center -- Periodicals14
- Columbia Basin Agricultural Research Center -- Periodicals5
- Dissertations, Academic -- United States -- Bibliography -- Catalogs5
- Oregon State University -- Dissertations -- Bibliography -- Catalogs5
- U.S. International Biological Program. Coniferous Forest Biome5
- Agriculture -- Research -- Columbia River Watershed4
- Arid regions agriculture -- Oregon3
- Merchant marine -- Northwest, Pacific -- Congresses3
- Shipping -- Northwest, Pacific -- Congresses3
- Agriculture -- Research -- Oregon, Eastern2
- Aquatic ecology2
- Barges -- Northwest, Pacific -- Congresses2
- Bridges, Concrete -- Cracking2
- Cargo ships -- Northwest, Pacific -- Congresses2
- Coastal zone management -- Law and legislation -- Oregon2
- Coastwise shipping -- Northwest, Pacific -- Congresses2
- Dissertations, Academic -- United States -- Bibliography2
- Flow meters -- Pacific Coast (Or.) -- Measurement2