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S. Drozdov,
“Use of water consumption metering as a tariff policy tool : Moldova's experience”. Moldova Apa-Canal Association of Water Supply and Sanitation Utilities, Chisinau, Moldova, p. 13 p., 2002.
G. Howard,
Water supply surveillance : a reference manual. Loughborough, UK: Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, 2002, p. xi, 236 p.