00499nam a2200205Ia 4500008004100000020001500041041001200056082001000068082001100078100001400089100001600103100001100119245004100130260001400171260003100185260000900216300001500225365002500240650002800265150901s9999    xx            000 0 und d  a8170413524  aEnglish  a574.5  bTYA/TE  aMehra M    aTyagi O D    eAuthor  aText book of environmental chemistry  aNew Delhi  bAnmol Publications Pvt Ltd  c2006  a404  Pages  aRs. 450               aEnvironmental chemistry