000 00292nam a2200133Ia 4500
100 _aHalsall/ Fred
942 _cBK
654 _acommunication
245 _aData communications
260 _bAddison Wesley Pub
_aWokington
_c1992
082 _a4.6
_bHAL
300 _a772
546 _aENGLISH
999 _c31737
_d31737