000 00278nam a2200121Ia 4500
100 _aGupta, S. P.
942 _cBK
245 _aStatistical methods ; 15th rev. ed.
260 _aNew Delhi
_bS. Cand & Sons
_c1981
082 _a311
_bGup
300 _aVarious
546 _aEnglish
999 _c334676
_d334676
041 _aeng