000 00313nam a2200145Ia 4500
100 _aCarrier// Crilly/Paul B
250 _a4
942 _cBK
654 _acommunication
245 _aCommunication system
260 _bMc Graw Hill Int
_c2002
082 _a621.38223
_bCAR
546 _aENGLISH
999 _c20320
_d20320