00819nam0-22003011i-450-99000048406040332120091201122046.00070010978000048406FED01000048406(Aleph)000048406FED0100004840620020821d1988----km-y0itay50------baenga-------001yyData communicationsWilliam L. SchweberNew YorkMcGraw-Hill©1988564 p.ill.24 cmSistemi di trasmissione dei dati004.6Schweber,William L.491666ITUNINARICAUNIMARCBK99000048406040332110 E II 442672 DEDINELDINELData communications332659UNINA