000 00325nam a2200145Ia 4500
100 _a Proakis, Jonh G
020 _a0-07-232111-3
250 _a4th ed
654 _aENGINEERING
942 _cBK
245 _aDigital communications
260 _aMcGraw - Hill, Boston
_c2001
082 _a621.381 Pro
300 _axxi,1002p
999 _c22530
_d22530