000 00311nam a2200121Ia 4500
008 220201s2012 xx 000 0 eng d
082 _a621.381
_bSIN
100 _aSingh, R.P.
245 0 _aCommunication systems
_bAnalog & Digital
260 _aNew Delhi
_bTata Mcgraw hill
_c2012
300 _a750
942 _2ddc
999 _c37487
_d37487