Fernando, D.A.K.Jayawardena, A.W.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.310-313https://dl-iesl.nsf.gov.lk/handle/1/3447Conference Paper