WEDC Conference -7

Ball, S., Pickford, J. & 7, W.E.D.C.Conference, 1982. Water, people and waste in developing countries : 7th WEDC Conference, 23 -25 September 1981 : proceedings, Loughborough, UK: Water, Engineering and Development Centre, Loughborough University of Technology, WEDC. Available at: https://fr.ircwash.org/sites/default/files/71-WEDC81-303.7.pdf.