000 00244nam a2200109Ia 4500
020 _a8126509147
082 _a621.382
100 _aSHANMUGAM, K.SAM
245 _aDIGITAL AND ANALOG COMMUNICATION SYSTEM
260 _aPHI
_b PHI
_c1985
942 _cBK
999 _c6581
_d6581