000 00292nam a2200133Ia 4500
100 _aCouch/Leon W
942 _cBK
654 _adigital
245 _aDigital and Analog communication system
260 _bPearson Edu
_c2001
082 _a621.3815
_bCOU
300 _a758
546 _aENGLISH
999 _c19420
_d19420