Subject
- Water-supply -- International cooperation3
- Wheat -- Breeding -- International cooperation2
- Wheat -- Oregon -- Field experiments2
- Wheat -- Varieties -- Statistics2
- Agriculture -- Research -- On-farm -- Oregon1
- Agriculture -- Research -- Oregon -- On-farm1
- Aquaculture -- International cooperation1
- Climatic changes1
- Columbia River Treaty (1961 January 17)1
- Dams1
- Dams -- Design and construction -- International cooperation1
- Dams -- International cooperation1
- Field experiments -- Oregon1
- Flood control -- International cooperation1
- Flood plain management -- International cooperation1
- Floods1
- Forests and forestry -- Research -- Belgium1
- Forests and forestry -- Research -- Czechoslovakia1
- Forests and forestry -- Research -- International cooperation1
- Forests and forestry -- Research -- Netherlands1