00322nam a22001217a 4500020001800000040001000018082001700028100002000045245003700065250001800102260004300120650003700163  a9780471728979  c NUST  a510.2462 KRE  aKreyszig, Erwin  aAdvanced Engineering Mathematics  aNinth Edition  aSingapore:bJohan Wiley & Sons,c2006.  aAdvanced Engineering Mathematics