000 00281nam a2200121Ia 4500
008 200701s2003 xx 000 0 eng d
100 _aWILLIAM STALLINGS
245 0 _aISDN-BROAD BAND ISDN
250 _a4th
260 _bPEARSON EDUCATION
_c2003
300 _a542
942 _2ddc
_cGE
999 _c2120
_d2120