008340000a22001810004500003000900000005001700009110013600026245021200162020001800374264004900392490004000441300000900481041000800490650005000498650003600548700003000584700003800614PH-MaWHO20241108112340.0  aWHO Expert Committee on Methods Used in Establishing Permissible Levels in Occupational exposure to Harmful Agents (1976 : Geneva).  aMethods used in establishing permissible levels in occupational exposure to harmful agents : report of a WHO Expert committee with the participation of ILO [meeting held in Geneva from 24 to 30 August 1976].  a92-4-120601-2  aGeneva : bWorld Health Organization,c1977.  a(WHO technical report series ; 601)  a68p.  aeng  aOccupational diseasesxPrevention and control  aMaximum allowable concentration  aWorld Health Organization  aInternational Labour Organisation