000 00297nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aB.D.Gupta
245 0 _aMathematical Physics
250 _a-
260 _a-
260 _b-
260 _c0
650 _aMathematical Physics
942 _cBK
999 _c1829
_d1829