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Archives I presume?
The colonial triumvirate fought diseases such as malaria, leprosis and sleeping illness. The latter was caused by the Tsetse fly. Map showing the spread of the Tsest fly in Africa. Offprint of Henrard C.L., 'Répartition des glossines au Congo belge et au Ruanda-Urundi', in Bulletin de l’Institut Royal Colonial Belge, XXII, facs. 4, 1951.
NAB, Archives INEAC, no. 11003.