«InfoGate». German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), Eschborn, Germany.
«Informal paper / WSP-ESA». Water and Sanitation Program - East and Southern Africa, Nairobi, Kenya.
K. Jerome,
«Infrastructure for poverty reduction and economic development in Africa ». UN-Habitat, United Nations Centre for Human Settlements, Nairobi, Kenya, p. 108 p.; 34 tab.; 18 fig.; 4 boxes.