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Topic
- Agriculture 8
- Irrigation 3
- Bureaucracy 2
- Deserts 2
- Drainage 2
- Erosion 2
- Precipitation (Meteorology) 2
- Soils 2
- Water quality 2
- Watersheds 2
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Region
- Sudan 8
- Egypt 3
- Ethiopia 2
- South Sudan 1
Publisher
- American Universities Field Staff 1
- Food and Agriculture Organization of the United Nations 1
- Frank Cass & Co. 1
- International Commission on Irrigation and Drainage 1
- Nauka 1
- Pergamon Press (Oxford, England) 1
- United Nations Development Programme 1
- United States. Joint Publications Research Service 1
- World Bank 1
Decade
- 1970-1979 8