007830000a22002050004500 PH-MaWHO 20241108112314.0 Review Group on Disinfectants and Disinfectant By-Products (1991 : Bethesda). 655293 revision of the WHO guidelines for drinking-water quality : report of the Review Group on Disinfectants and Disinfectant By-Products, Bethesda, Maryland, U.S.A., 10-14 June 1991. WHO/PEP/91.31.--Unpublished Geneva : World Health Organization, 1991. [10]p. WHO Documents File eng Water quality Standards 621208 Potable water Standards 655294 Water microbiology 360048 Guidelines 648758 DOC 7134 7134 0 0 0 0 WPRO WPRO 2021-05-23 0 WHO Documents File 07134 2024-01-24 00:00:00 2021-05-23 DOC