000 00302nam a2200133Ia 4500
100 _aCarlson/A.Bruce
942 _cBK
654 _acommunication systems
245 _aCommunication Systems
260 _bMcGraw Hill
_aNew York
_c1986
082 _a621.38043
_bCAR
300 _a686
546 _aENGLISH
999 _c33619
_d33619