000 00305nam a2200121Ia 4500
020 _a9788178080987
100 _aFred Halsall
245 _aData Communications, Computer Networks and Open Systems
250 _a4th
260 _c2002
_bPearson Education Asia
_aNew Delhi
300 _axvi+907
942 _cBK
999 _c28132
_d28132