00287nam a2200109Ia 4500008004100000082001500041100001700056245003500073250001700108260004300125300000900168240913s9999||||xx |||||||||||||| ||und||  a310  GUP/E  aBy S P Gupta 0aElementary statistical methods  a11 th rev Ed  bSultan Chand and SonsaNew Delhic1991  a748p