00504nam a2200181 a 450000500170000002000150001708200170003210000180004924500330006726000370010030000270013769000180016470000150018296400160019799700190021399900190023295200710025120251203110853.0  a8178000849  a577.276bTRI  aTrivedy, R.K.  aIntrduction to air pollution  aHyderabadbBS Publicationsc2005  axii, 284p.c24 cm.bHB  aAir pollution  aGoel, P.K.  bcdefg_  a127619 LIBSC C  c105626d105626  00104070aPUbPUd2008-02-11g396.00l0o577.276 TRIp127619yBK