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United Nations Environment Programme, GEMS/Water ,  [Global Drinking Water Quality Index Development and Sensitivity Analysis Report] ,  Global Drinking Water Quality Index Development and Sensitivity Analysis Report

United Nations Environment Programme ,  United Nations Environment Programme Global Environment Monitoring System (GEMS)/Water Programme ,  United Nations World Water Assessment Programme (UN-WWAP) ,  [Water quality outlook] ,  Water quality outlook

United Nations Environment Programme ,  [North America's environment: a thirty-year state of the environment and policy] ,  North America's environment: a thirty-year state of the environment and policy