000 00237nam a2200109Ia 4500
100 _aGupta, S P
942 _cBK
245 _aStatistical methods 23rd rev ed
260 _aDelhi
_bS Chand
_c1987
082 _a311
_bGup
546 _aEnglish
999 _c339219
_d339219
041 _aeng