00266nam a2200109Ia 4500008004100000082002100041100001500062245002500077250000900102260003600111300000900147240913s9999||||xx |||||||||||||| ||und||  aGS    310  GUP/P  aS.P. Gupta 0aPractical statistics  aNULL  bS Chand and CoaNew Delhic1993  a564p