000 00335nam a2200169Ia 4500
100 _aGupta, S P
080 _a311
080 _bGup/
526 _dNTB
526 _aUG
366 _f0%
942 _cBK
245 _aStatistical methods 
260 _aSultan chand and sons
_bNew Delhi
_c2018
300 _axx,1432
546 _aE
999 _c56355
_d56355