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Topic
- Watersheds 22
- Groundwater 10
- Aquifers 7
- Aswan High Dam (Egypt) 5
- Irrigation 5
- Agriculture 4
- Hydrogeology 4
- Hydrology 3
- Sandstone 3
- Water consumption 3
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Region
- Egypt 19
- Sudan 7
- South Sudan 2
Water Basin
- River Nile >> Sudan 22
Publisher
- United States. Joint Publications Research Service 5
- Unesco 3
- 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. Army. Corps of Engineers 1
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Decade
- 1980-1989 22