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Donor
- Naff, Thomas 24
Topic
- Agriculture 14
- Irrigation 8
- Technology 7
- Water quality 7
- Hydrology 6
- Deserts 5
- Economics 4
- Groundwater 4
- Watersheds 4
- Desertification 3
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Publisher
- Pergamon Press (Oxford, England) 24
Decade
- 1970-1979 24