000 00322nam a2200121Ia 4500
100 _aWilliam Richard A
942 _cBK
654 _acommunication systems
245 _aCommunication systems Analysis and Design: A System Approach
260 _bPrentice Hall
_aNew Jersey
_c1987
300 _a653
546 _aENGLISH
999 _c26918
_d26918