000 00249nam a2200109Ia 4500
008 211126s9999 xx 000 0 und d
082 _a510.2462
100 _aMRIDULA CHUGH
245 0 _aENGINEERING CHEMISTRY
260 _bPEARSON
942 _cBTECH
999 _c172030
_d172030