C. Kariyawasam,
«Disposal of excreta and sullage», in
The proceedings of the 14th WEDC Conference : water and urban services in Asia and the Pacific : Kuala Lumpur, 11-15 April 1988, 1988, pp. p. 91-94: tab.
A. G. Lu, Valencia, L. B., L. Llagas, delas, Aballa, L., y Postrado, L.,
«Filariasis : a study of knowledge, attitudes and practices of the people of Sorsogon : final report of a project supported by the TDR Social and Economic Research Component», vol. no. 1. World Health Organization (WHO), Geneva, Switzerland, p. viii, 61 p.: map, 1988.
S. B. Mogane,
«A sociological evaluation of village water supply project[s] in the Valley of a Thousand Hills near Durban», in
Seminar on water supply and sanitation, KwaZulu : Elangeni Hotel, Durban, 28-30 June, 1988 : papers, 1988, p. Paper B.2 (13 p.).