000 00301nam a2200121Ia 4500
008 160122s9999 xx 000 0 und d
041 _aEnglish
100 _aDouglas E Comer
245 _aComputer networks and internets
260 _bSingapur:Pearson Edu.
_c2001
300 _a578p.
650 _aComputer
999 _c4329
_d4329