Epidemiological evaluation unit (EPI): progress report, July 1984 - April 1985
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World Health Organization & Onchocerciasis Control Programme in the Volta River Basin Area. (1985). Epidemiological evaluation unit (EPI): progress report, July 1984 - April 1985. Onchocerciasis Control Programme in the Volta River Basin Area. https://iris.who.int/handle/10665/279713