A. S. Ubaiddha y Liyanage, R. S.,
«Low-cost tanks and filters in Sri-Lanka», in
Towards the millennium development goals - actions for water and environmental sanitation : proceedings of the 29th WEDC conference, Abuja, Nigeria, 2003, Loughborough, UK, 2003, pp. P. 81-84 : 9 fig., 1 tab.
