00757nam0-22002771i-450-990002546830403321000254683FED01000254683(Aleph)000254683FED0100025468320000920d1971----km-y0itay50------baENG<<An >>Introduction Transform TheoryD.V. Widder.New YorkAcademic Press1971.253 p.24 cmFunzioni speciali519Widder,David Vernon<1898- >308275ITUNINARICAUNIMARCBK990002546830403321MIX-B-162401 mMASMASIntroduction Transform Theory437576UNINAING01