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- Aquifers 6
- Politics and government 4
- Agriculture 3
- Groundwater 3
- Water quality 3
- Wells 3
- Economics 2
- Hydrology 2
- Technology 2
- Arid regions 1
- Bureaucracy 1
- Canals 1
- Dams 1
- Droughts 1
- Hardware, Computer 1
- Human rights 1
- Hussein, King of Jordan, 1935-1999 1
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- International regimes 1
- Irrigation 1