000 00424nam a2200157Ia 4500
008 211115s9999 xx 000 0 und d
041 _aeng
082 _aB3
_bK9R
100 _aRellich, Franz.
245 0 _aPerturbation Theory of Eigenvalue Problems /
250 _a1st ed /
260 _aNew York-11 :
_bGordon & Breach Science Publishers Inc..
300 _ap.119 :
650 _aPerturbation Theory
942 _cTB
999 _c3612
_d3612