S. Godfrey,
“People-centred approaches to water and environmental sanitation : proceedings of the 30th WEDC Conference, Vientiane, Lao PDR, 25-29 October 2004
”. Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, Loughborough, UK, p. xiv, 709 p. : boxes, fig., photogr., tab., 2005.