00686nam0-22002531i-450-990001131570403321000113157FED01000113157(Aleph)000113157FED0100011315720000920d1964----km-y0itay50------baengDifferential equationsby Bear.s.l.Addison-Wesley1964Addison-Wesley series in mathematicsBear,Herbert Stanley54344ITUNINARICAUNIMARCBK99000113157040332121-G-7-BIS8452MA1MA1Differential equations345502UNINAING01