000 00401nam a2200169Ia 4500
650 _aTelecommunication
520 _aIssue No.1-4,6-9,12
365 _cRS
365 _d1
942 _cBV
654 _aVoice
654 _aData
654 _aTelecommunication
245 _aVoice and Data
_bThe Business of Communication
260 _bGupta, Pradeep. New Delhi
_c2002-2003
_aNational
440 _v9
999 _c21790
_d21790