000 00299nam a2200133Ia 4500
008 211209s1971 xx 000 0 und d
041 _aeng
082 _a530.15 N71 GUP
100 _aGUPTA
245 _aMATHEMATICAL PHYSICS
250 _a2 ed.
260 _bCALICO PUBLISHERS
_c1971
300 _a995
999 _c6826
_d6826