000 00279nam a2200121Ia 4500
008 210311s9999 xx 000 0 und d
040 _crty
100 _aGupta, S.P. and Gupta, Archana
245 0 _aStatistical Methods
260 _aNew Delhi
300 _a1991
942 _cTU
999 _c261633
_d261633