IRC International Water and Sanitation Centre, The Hague, NL and Moratuwa, L. K. Sarvodaya,
“Management for sustainability in water supply and sanitation programmes : September 6-26, 1997, Kandy, Sri Lanka : block 2 : sustainability issues”. Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. ca. 210 p. : fig., tab., 1997.