000 00281nam a2200109Ia 4500
008 201121s9999 xx 000 0 und d
100 _aChern,S.S.
245 0 _atransactions of the American Methematical Society
260 _bNewyork :Society Menagha
300 _c532
942 _cBV
999 _c16624
_d16624