00797nam0-22002771i-450-990001006580403321000100658FED01000100658(Aleph)000100658FED0100010065820000920d1964----km-y0itay50------baengPartial Differential Equationsan introductionGunter HellwigNew York [etc.]Blaisdell1964xiii, 263 p.26 cmEquazioni differenziali e integroDifferenziali517.37Hellwig,Gunter40782ITUNINARICAUNIMARCBK99000100658040332115-0621221 F.S.FI1FI1Partial differential equations189147UNINAING01