00272nam a22000977a 4500020001800000082001600018100001900034245005500053260005600108300001000164  a9788126511914  a515.7 KRE/K  aErwin Kreyszig  aIntroductory Functional Analysis with Applications  bWiley India Pvt. Ltd. (Wiley Student Edition)c2007  a704p.