000 00254nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aS P Gupta
245 0 _aStatistical methods
260 _aNew Delhi
_bSultan Chand
_c1995
650 _aMath
942 _cBK
999 _c8957
_d8957