Sutherland, J.P.Folkard, G.K.Mtawali, M.A.Grant, W.D.2021-07-012021-07-011994Affordable Water Supply and Sanitation:Proceedings of the 20th WEDC Conference, Taj Samudra Hotel, Colombo, Sri Lanka, 22-26 August 1994:p.297-299https://dl-iesl.nsf.gov.lk/handle/1/3443Conference Paper