00479nam a22001817a 4500 117233 117232 OSt 20260706113027.0 210416b ||||| |||| 00| 0 eng d 9789351611769 533 GUP Gupta,S P 1020 Statistical methods by Gupta S P 46 Delhi Sultan Chand & Sons 2021 A.43;10.21 Index number Regression analysis Vital statistics ddc BK