«Safe water managed by people». Sri Lanka, Ministry of Local Government, Housing & Construction, Colombo, Sri Lanka, p. video (27 min.): VHS.
«SANDEC news». Water and Sanitation in Developing Countries (SANDEC), Duebendorf, Switzerland.
S. Africa. De ZA,
«Sanitation technology options». South Africa, Department of Water Affairs and Forestry, Pretoria, South Africa, p. 30 p.; ill.; techn. drwng; tab.; fig.