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The fertility impact of rural development projects : the case of the Rahad irrigation project, Sudan / by El-Rayah Abdalla Osman.
- UMI,
- 1996.
- Ann Arbor, MI :
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Develop a useful management tool for water resources allocation in the Saq aquifer in Al-Qassim region, Saudi Arabia / by Ibrahim Saleh Al-Salamah.
- UMI,
- 2002.
- Ann Arbor, MI :