000 00324nam a2200121Ia 4500
008 220201s9999 xx 000 0 eng d
082 _a621.382
_bSIN
100 _aSingh, R.P and Sapre S.D
245 0 _acommunication systems analog and digital
260 _aNew Delhi
_bMcgraw hill Education
300 _a750
942 _2ddc
999 _c29816
_d29816