000 00286nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.382
100 _aJohn G Proakis
245 0 _aCommunication systems engineering
250 _a1
260 _bPearson Education
_c2002
942 _cBK
999 _c281
_d281