000 00387nam a22001457a 4500
005 20250328095800.0
008 250328b |||||||| |||| 00| 0 eng d
041 _aeng
082 _a512.94
_bREL/P
100 _aRellich Franz
245 _aPerturbation THeory of Eigenvalue Problems
_c/ by Franz Rellich
260 _aNew York
_bGordon and Breach
_c1969
300 _a127p.
942 _cBK
999 _c35309
_d35309