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082 _a004.65
082 _bJEF
100 _aJEFFORDS, JOHN M.
245 0 _aELECTRONIC COMMUNICATIONS : PRINCIPLES AND SYSTEMS.
260 _aNEW DELHI
260 _bCENGAGE LEARNING PVT. LTD.
650 _a  ELECTRONIC COMMUNICATIONS
700 _aSTANLEY, WILLIAM D.
942 _cBKCD
999 _c140584
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