00876nam0-22003011i-450-990000034930403321000003493FED01000003493(Aleph)000003493FED0100000349320011111d--------km-y0itay50------baitay-------001yyPrinciples of comunication systemsW. D. Hershberger.New YorkPrentice Hall1955XIII, 253 p.ill.22 cmPrentice-Hall electrical engineering seriesSistemi di comunicazione621.382Hershberger,William Delmar801ITUNINARICAUNIMARCBK99000003493040332113 B 52 2121883FINBCFINBCPrinciples of comunication systems105851UNINAING01