000 00262nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _astalling (williams)
245 0 _adata and computer communica.
250 _a5
260 _bPRENTICE HALL
942 _2ddc
_cBTECH
999 _c5951
_d5951