000 00300nam a2200121Ia 4500
999 _c30136
_d30136
020 _a9788178080987
100 _aFred Halsall
245 _aData Communications, Computer Networks and Open Systems
250 _a4
260 _c2005
_bPEARSON EDUCATION
_aNew Delhi
300 _axv+907
942 _cBB