TY - GEN AU - United Nations Environment Programme AU - World Health Organization AU - United Nations Educational, Scientific and Cultural Organization AU - World Meteorological Organization A4 - Meybeck, Michel A4 - Bartram, Jamie A4 - Wheeler, David PY - 1992 UR - https://wedocs.unep.org/handle/20.500.11822/8248 LA - English KW - water KW - pollutant KW - river KW - lake KW - groundwater TI - GEMS-Water Operational Guide M3 - Communication or other resource ER -