German Centre for International Training in Water and Waste Management -Bonn, DE

ZM, L.(City). Ur et al., 1989. Report on International Seminar "Operation and Maintenance of Urban Water Supply Schemes" : Lusaka, Zambia, May 8-13, 1989, Bonn, Germany: German Centre for International Training in Water and Waste Management. Available at: https://fr.ircwash.org/sites/default/files/204.1-89RE-6436.pdf.