00924nam0-22003011i-450-99000048701040332120100416114129.00471326615000048701FED01000048701(Aleph)000048701FED0100004870120020821d1977----km-y0itay50------baenga-------001yyAnalog and digital communicationconcepts, systems, applications, and services in electrical dissemination of aural, visual and data informationW. David GreggNew YorkWiley1977603 p.ill.24 cmTelecomunicazioni621.38Gregg,W. David340061ITUNINARICAUNIMARCBK99000048701040332110 E II 2779590DINELDINELAnalog and digital communication332496UNINA