000 00281nam a22001217a 4500
999 _c6022
_d6022
003 OSt
005 20210316125913.0
008 210316b ||||| |||| 00| 0 eng d
100 _aJOHN G. PROAKIS
245 _aCOMMUNICATION SYSTEMS ENGINEERING
260 _bPEARSON
942 _2ddc
_cGE