000 00251nam a2200097Ia 4500
008 230508s2000 xx 000 0 und d
041 _aeng
100 _aWILLIAM A.SHAY
245 _aUNDER STANDING DATA COMM. OF NETWORK 2ND ED
260 _bTHOMSON
_c2000
999 _c322567
_d322567