Report of the fourteenth session of the ecological group: Cotonou, 18-22 January 1993
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World Health Organization & Onchocerciasis Control Programme in West Africa. (1993). Report of the fourteenth session of the ecological group: Cotonou, 18-22 January 1993. Onchocerciasis Control Programme in West Africa. https://iris.who.int/handle/10665/279002