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Topic
- Irrigation 13
- Agriculture 8
- Groundwater 5
- Technology 5
- Aswan High Dam (Egypt) 4
- Hydrology 4
- Bureaucracy 3
- Drainage 3
- Water quality 3
- Evapotranspiration 2
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Region
- Egypt 13
- Sudan 4
- Ethiopia 2
- South Sudan 2
Publisher
- Food and Agriculture Organization of the United Nations 2
- United Nations Development Programme 2
- American Society of Civil Engineers 1
- Arab Report and Record 1
- International Commission on Irrigation and Drainage 1
- International Water Resources Association 1
- Pergamon Press (Oxford, England) 1
- United States. Agency for International Development 1
- United States. Government Printing Office 1
- United States. Joint Publications Research Service 1
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Decade
- 1970-1979 13