000 00307nam a2200133Ia 4500
100 _aLewis Mackenzie
020 _a0-07-709273-2
654 _aCOMMUNICATION
942 _cBK
245 _aCommunications and networks
260 _aMcGraw - Hill, London
_cc1998
082 _a384.648 Mac
300 _axv,544p
999 _c23770
_d23770