000 00298pam a2200121a 44500
082 _a519.8
_bF926J
100 _aFroman, Nanny
245 1 _aJWKB APPROXIMATION
_bCONTRIBUTIONS TO THE THEORY
260 _a
_bNorth-Holland
_c1965
700 _aFroman, Per Olof
964 _gCIRC
997 _a36587 C
999 _c412767
_d412767