000 00311nam a22001337a 4500
999 _c1268
_d1268
020 _a9780074636824
082 _a621.38202
100 _aGeorge Kennedy & Bernard Davis
245 _aElectronic communication systems
250 _a4th
260 _aNew Delhi
_bMcGraw Hill
_c2010
300 _a763
942 _cBK