000 00324 a2200133 4500
020 _a8120325591
082 _a621.382
_bCOM
090 _c12817
_d18658
245 _aCommunication systems
260 _aNew Delhi
_bPrentice - Hall
_c2004
_g2004
300 _aix, 458p.
_c23cm.
650 _acommunications networks
942 _cL
999 _c41179
_d41179