006140000a22001690004500003000900000005001700009110006400026245016000090562003200250264004900282300000900331041000800340650002900348650002900377650002300406650001500429PH-MaWHO20241108112315.0  aReview Group Meeting on Inorganics (2nd : 1991 : Brussels).  aRevision of the WHO guidelines for drinking-water quality : report of the Second Review Group Meeting on Inorganics, Brussels, Belgium, 14-18 October 1991.  aWHO/PEP/91.32.--Unpublished  aGeneva : bWorld Health Organization,c1991.  a17p.  aeng  aWater qualityxStandards  aPotable waterxStandards  aWater microbiology  aGuidelines