000 00278nam a2200121Ia 4500
999 _c17478
_d17478
020 _a0029464404
100 _aWilliam Stallings
245 _aData and Computer Communications
250 _a2
260 _c1989
_bMAXWELL MACMILLAN
_aNew York
300 _axvii+653
942 _cREF