00285nam a2200109Ia 4500008004100000082002400041100001400065245002500079250001600104260004400120300001100164240913s9999||||xx |||||||||||||| ||und||  aGS    530.15  GUP/M  aB D Gupta 0aMathematical physics  a2 nd rev ed  bVikas Publishing HouseaNew Delhic1993  a15150p