S. Niedrum,
«Byumba water supply project : project implementation and monitoring report». Cooperative for American Relief Everywhere, Kigali, Rwanda, p. various paging, 1992.
D. General fo DGIS,
«Regional policy plan for East Africa : 1992 - 1995». Netherlands, Ministry of Foreign Affairs, DGIS, The Hague, The Netherlands, p. 121 p.: map, 1992.