00710nam0-22002771i-450-990001091830403321000109183FED01000109183(Aleph)000109183FED0100010918320000920d1952----km-y0itay50------baengUltrasonic Physicsby E.G. RichardsonAmsterdam [etc.]Elsevier1952SuonoAcustica534Richardson,Edward Gick1710ITUNINARICAUNIMARCBK99000109183040332126-015.00116465FI1FI1Ultrasonic physics106928UNINAING01