00304nam a2200121 a 450000500170000002000150001708200220003210000200005424500370007425000120011126000380012330000210016120251203091722.0  a0471599891  a510.2462,bD, KRE  aKreyszig, Erwin  aAdvanced engineering mathematics  a7th ed.  aNew YorkbJohn Wiley & Sonsc1993  axvii,1271p, 24cm