000 00288nam a2200109Ia 4500
008 201121s9999 xx 000 0 und d
100 _aLevi,F.w.
245 0 _aBulletin of the Calcutta Mathematical Society
260 _bCalcutta: Calcutta Mathematical So.
300 _c159
942 _cBV
999 _c16668
_d16668