Joint Programme Committee twelfth session, Riyadh, Saudi Arabia 1-4 December 1991: report
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World Health Organization & Onchocerciasis Control Programme in West Africa. (1991). Joint Programme Committee twelfth session, Riyadh, Saudi Arabia 1-4 December 1991: report. Onchocerciasis Control Programme in West Africa. https://iris.who.int/handle/10665/311019