A. Pacey,
“Sanitation in developing countries”. Wiley, Chichester, UK, p. xiv, 238 p. : fig., tab., 1978.
H. Bantje,
“Sociological aspects of improved water supply in the coast region”, vol. no. 31. University of Dar es Salaam, Bureau of Resource Assesssment and Land Use Planning, Dar es Salaam, Tanzania, p. 30 pp. : 8 tab., 1978.