000 00448pam a2200157a 44500
008 160408bc1969 xxu||||| |||| 00| 0 eng d
082 _a517.57
_bR27p
100 _aRellich, Franz
245 1 _aPERTURBATION THEORY OF EIGENVALUE PROBLEMS
260 _aNew York
_bGordon And Breach
_cc1969
300 _ax,127
440 _aNotes On Mathematics And Its Applications
_v
650 _aFunctional Analysis
964 _gCIRC
997 _aA11646 C
999 _c257915
_d257915