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Donor
- Kolars, John F. 15
Topic
- Agriculture 4
- Population 4
- Contamination of environment 2
- Housing 2
- Irrigation 2
- Water quality 2
- Water-supply 2
- Dams 1
- Ecology 1
- Economics 1
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Institution
- Oregon State University 15
Decade
- 1970-1979 15