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Publisher
- United States. Joint Publications Research Service 3
- Johns Hopkins Population Center 2
- United States. Environmental Protection Agency 2
- University of Michigan 2
- Akādīmīyat al-Baḥth al-ʻIlmī wa-al-Tiknūlūjiyā 1
- American Chamber of Commerce in Egypt 1
- Jāmiʻat al-Iskandarīyah 1
- Pergamon Press (Oxford, England) 1
- United Nations 1
- University of Toronto 1
- World Bank 1
