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Topic
- Watersheds 19
- Groundwater 8
- Aquifers 6
- Aswan High Dam (Egypt) 5
- Agriculture 4
- Irrigation 4
- Hydrogeology 3
- Water consumption 3
- Water quality 3
- Contamination of environment 2
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Region
- Egypt 19
- Sudan 5
- South Sudan 2
Publisher
- United States. Joint Publications Research Service 5
- Unesco 2
- United Nations 2
- European Mediterranean Commission of Water Planning 1
- International Association of Hydrological Sciences 1
- Karl-Marx-Universität Leipzig 1
- Middle East Economic Digest Ltd. 1
- Pergamon Press (Oxford, England) 1
- United Nations Development Programme 1
- United States. Environmental Protection Agency 1
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Decade
- 1980-1989 19