00402nam a2200133Ia 4500082002000000100002500020245002900045260004800074300002200122490006000144500005400204500000500258700000500263  a515.73bG224.HA  aGardiner, Stephen J.  aHarmonic approximationb  aCambridgebCambridge University Pressc1995  axiii, 132p. Index  aLondon Mathematical Society lecture note seriesv v.221  a"Purchased under NBHM grant for the year 1995-96"  a  a