00728nam0-22002771i-450-990001254550403321000125455FED01000125455(Aleph)000125455FED0100012545520000920d1968----km-y0itay50------baengAsymptotic ApproximationsH. JeffreysOxfords.l.Clarendon Press1968Approssimazioni asintotiche511.4Jeffreys,Harold12419ITUNINARICAUNIMARCBK9900012545504033218-F-248446MA1MA141A60Asymptotic approximations117893UNINAING01