000 00302nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a621.3815 COU
100 _aCOUCH (LEON W.)
245 _aDigital and Analog Communication Systems
260 _aNew Delhi
_bPEARSON
365 _cRS
999 _c180130
_d180130