000 00312nam a2200109Ia 4500
008 210616s9999 xx 000 0 und d
100 _aShanmugam, K. Sam
245 0 _aDigital and analog communication systems
260 _c1979
650 _aEngineering and Allied Operations
_bElectrical Engineering
942 _cBK
999 _c1988
_d1988