006920000a22001810004500003000900000005001700009110008500026245017400111562002100285050001700306264004900323300000800372041001400380650003900394650003500433650002500468650001700493PH-MaWHO20241108112239.0  aWorld Health Organization. Office of Global and Integrated Environmental Health.  aHealth and environment library modules : environmental health : general issues = Modules documentaires sante environnement : salubrite de l` environnement : generalites.  aWHO/EHG/97.2/GEN  a2nd rev. ed.  aGeneva : bWorld Health Organization,c1997.  a9p.  aeng ; fre  aEnvironmental healthvBibliography  aLibrary collection development  aInformation services  aWater supply