000 00282nam a2200121Ia 4500
100 _aBarker,forrest
020 _a0-13-153982-5
942 _cBK
245 _aCommunication electronics
260 _aPrentice-hall internatinal, USA
_c1987
082 _a621.38 Bar
300 _axii,676
999 _c58955
_d58955