JAYALATH, J. ... et al, 1994. Algae removal by roughing filter. IN: Pickford, J. et al. (eds). Affordable water supply and sanitation: Proceedings of the 20th WEDC International Conference, Colombo, Sri Lanka, 22-26 August 1994, pp.275-277.
This is a conference paper.
The authors thank for the financial assistance given by
the Natural Resources, Energy and Science Authority of
Sri Lanka (Research Grant RG/92/B/06).