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Drechsel, Pay ,  Keraita, Bernard N. ,  Amoah, Philip ,  [Safer irrigation practices for reducing vegetable contamination in urban Sub-Saharan Africa: an illustrated guide for farmers and extension officers.] ,  Safer irrigation practices for reducing vegetable contamination in urban Sub-Saharan Africa: an illustrated guide for farmers and extension officers.

Keraita, Bernard N. ,  Drechsel, Pay ,  [Agricultural water reuse in low-income settings: health risks and risk management strategies] ,  Agricultural water reuse in low-income settings: health risks and risk management strategies

Drechsel, Pay ,  Keraita, Bernard N. ,  Cofie, Olufunke O. ,  Nikiema, Josiane ,  [Productive and safe use of urban organic wastes and wastewater in urban food production systems in low-income counties] ,  Productive and safe use of urban organic wastes and wastewater in urban food production systems in low-income counties