00345cam a2200145ua 45000010005000000080039000050400009000440410012000530820016000651000018000812450026000992600039001253000009001646530026001736896111226n1982    II  |||gr||||Z||||||eng  aMAIN  aEnglish  a330.021 GUP  aGUPTA , S.P .  aPRACTICAL STATISTICS   aNEW DELHIbS.CHAND & COMPANYc1982  a629.  aStatistical Economics