00776nam0-22002891i-450-99000049073040332120071107105754.0000049073FED01000049073(Aleph)000049073FED0100004907320020821d1971----km-y0itay50------baenga-------001yyUltrasonic transducer materialsO. E. MattiatNew York ; LondonPlenum press1971185 p.ill.24 cmUltrasonic technologyGeneratori di ultrasuoni620.28Mattiat,O. E.ITUNINARICAUNIMARCBK99000049073040332110 E I 1467301DINELDINELUNINA