J. Copperman,
“The impact of village water supplies in Botswana : a study of four villages : Mmathethe, Modipane, Sojwe, Tsamaya”. SIDA, Swedish International Development Cooperation Agency, Gaborone, Botswana, p. 90 p.: map, photogr., 1978.
H. Kebede,
“Improving village water supplies in Ethiopia : a case study of socio-economic implications”, vol. ECA/SDD/ATRCW/VTWATER/78. United Nations Economic Commission for Africa (ECA), Addis Ababa, Ethiopia, p. 62 pp. : tab. fig., 1978.