000 00247nam a2200109Ia 4500
008 230411s9999 xx 000 0 und d
082 _a621.382
_bHAY
100 _a HAYKIN SIMON
245 0 _aCOMMUNICATION SYSTEMS
260 _bWILLEY
942 _cBK
999 _c3214
_d3214