Wijegoonewardena, S.J.P.

Karunadasa, H.I. & Wijegoonewardena, S.J.P., 1989. The overview and final report of the public standpost water supplies and sanitation (PSWS) project, Sri Lanka, Ratmalana, Sri Lanka: National Water Supply and Drainage Board. Available at: https://es.ircwash.org/sites/default/files/822-89-6956.pdf.