000 00277nam a2200121Ia 4500
008 210501s9999 xx 000 0 und d
020 _a81-7758.1651
082 _a4.6
100 _aDouglas; E.Cormer
245 0 _aComputer Networks And Internet
260 _b--
942 _cBCA
999 _c43009
_d43009