00278nam a2200109Ia 4500008004100000082001800041100002100059245002500080250001200105260004300117300000800160240913s9999||||xx |||||||||||||| ||und||  a530.15  CHA/M  aPK.Chattopadhyay 0aMathematical Physics  a2nd Ed.  bNew Age InternationalaNew Delhic2013  a352