000 00469nam a22001451 4500
005 20160318124954.0
008 840619s1962 enka b 000 0 eng
082 0 0 _a517.38
_bHEA
100 1 _aHeading, John.
_91365
245 1 3 _aAn introduction to phase-integral methods.
300 _a160 p.
_billus.
_c20 cm.
653 _aDifferential equations, Linear--Numerical solutions.
_aIntegrals
_aMathematical physics.
942 _cBK
260 _aLondon,
_bMethuen;
_c[1962]
999 _c150319
_d150319