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Social preferences for improving water quality : an economic analysis of benefits from waste-water treatment / by Areti Kontogianni ... [et al.]. - Norwich : Centre for Social and Economic Research on the Global Environment, 2001. - 33p. - CSERGE working paper, GEC 01-04 0967-8875 ; . - CSERGE working paper, GEC 01-04 .


Water quality.