00322nam a2200121 a 450000500170000002000150001708200220003210000200005424500580007425000110013226000350014330000220017820251203092007.0  a0471599891  a510.2462,bD, kre  aKreyszig, Erwin  aAdvanced engineering mathematics, Erwin Kreyszig, eng  a7th ed  aNew York, John Wiley, USc1993  axvii,1271p.c22cm