Water, Engineering and Development Centre -Loughborough, GB, WEDC and IRC International Water and Sanitation Centre, The Hague, NL,
[.. title in Sinhalese ..] [Practical solutions in drinking water supply and wastes disposal for developing countries], 2nd rev.ed.nd ed., vol. no. 20. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1986, p. 162 p.: fig.
