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Opportunities for expanding water harvesting in sub-Saharan Africa : the case of the Teras of Kassala / Johan A. van Dijk, Mohamed Hassan Ahmed.
- International institute for environment and development (IIED). Sustainable agriculture programme,
- 1993.
- London :
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Facing the future : beyond the Earth summit / Johan Holmberg, Koy Thomson and Lloyd Timberlake ; photogr. by Mark Edwards.
- IIED,
- 1993.
- London :
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Pediatric Diagnosis: An Illustrated Guide to Disorders of Surgical Significance / Spencer W. Beasley, Johan M. Hutson, Nate A. Myers.
- 617.98
- Beasley, Spencer W.
- Chapman & Hall,
- 1993.
- London :