00321cam a2200133ua 45000010005000000080039000050400009000440410012000530820016000651000017000812450024000982600039001226530026001616223120424n1995    II  |||gr||||Z||||||eng  aMAIN  aEnglish  a330.021 GUP  aGUPTA, S. P.  aSTATISTICAL METHODS  aNEW DELHIbS.CHAND & COMPANYc1995  aStatistical Economics