000 00290nam a2200109Ia 4500
008 230411s9999 xx 000 0 und d
082 _a004.6
_bHAL
100 _a HALSALL (FRED)
245 0 _aData Communication Computer Networks and Open Systems
260 _b PEARSON
_a Delhi
942 _cBK
999 _c2465
_d2465