000 00294nam a2200121Ia 4500
999 _c30406
_d30406
020 _a9788178080987
100 _aFred Halsall
245 _aData Communications, Computer Networks and Open Systems
250 _a4
260 _c2004
_bPEARSON EDUCATION
_aDelhi
300 _axvi+907
942 _cBB