005590000a22001570004500003000900000005001700009110009200026245011900118020001800237264004900255490004000304300000900344041000800353650002500361650001500386PH-MaWHO20241108112320.0 aWorld Health Organization Expert Committee on environmental Sanitation (1953 : Geneva). aExpert Committee on environmental Sanitation : third report [of a meeting held in Geneva from 27 to 31 July 1953]. a92-4-120077-4 aGeneva : bWorld Health Organization,c1954. a(WHO technical report series ; 77). a25p. aeng aEnvironmental health aSanitation