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Publisher
- Food and Agriculture Organization of the United Nations 3
- International Center for Agricultural Research in the Dry Areas 2
- Middle East Economic Digest Ltd. 2
- American Chamber of Commerce in Egypt 1
- American Universities Field Staff 1
- Arab Centre for the Studies of Arid Zones and Dry Lands 1
- Asian Institute of Technology 1
- Free Press 1
- International Association of Hydrological Sciences 1
- International Hydrological Programme 1
- Middle East Institute (Washington, D.C.) 1
- Pergamon Press (Oxford, England) 1
- Unesco. Regional Office for Science and Technology in the Arab States 1
- United Nations Development Programme 1
- United States. Joint Publications Research Service 1
