00453nam a22001572  4500001001100000005001700011008004100028020002700069040001500096100002900111245003800140250001000178260004800188300001600236650004300252000000917320151217145847.0080910s         xx           000 0 eng d  a0174482167 :cKES 1110  aKABUcKABU1 aAllen, John.@000015957510aTelecommunications /cJohn Allen.  a  ed.  aWalton-on-Thames, England :bNelson,c1990.  aix, 117  p. 0aTelecommunication systems.@0000154288