000 00326nam a2200133Ia 4500
008 161018s9999 xx 000 0 und d
020 _a9788120307131
100 _aViswanathan.T
_91556
245 _aTelecommunication Switching Systems And Networks
250 _a0Ed
260 _bPhi
300 _a584p.
_bRs:250
490 _a0839
999 _c839
_d839