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Donor
- Naff, Thomas 25
Topic
- Hydrology 25
- Irrigation 20
- Building 12
- Resource allocation 11
- Groundwater 9
- Water-power 9
- Finance 8
- Water diversion 8
- Water--Storage 8
- Politics and government 7
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Type
- Text 25
Decade
- 1950-1959 25