00789nam0-22002891i-450-990001013350403321000101335FED01000101335(Aleph)000101335FED0100010133520000920d1962----km-y0itay50------baengAsymptotic ApproximationsBy Harold JeffreysOxfordClarendon Press1962144 p.22 cmEquazioni differenziali e integroDifferenziali517.35517.39Jeffreys,Harold12419ITUNINARICAUNIMARCBK99000101335040332115-0403492 F.T.FI1FI1Asymptotic approximations117893UNINAING01