000 00338nam a2200145Ia 4500
008 221231s9999 xx 000 0 und d
100 _aZwinky,  Elzabeth D
_93486
245 0 _aBuilding Internet Firewalls
250 _a2
260 _bO Railly
260 _c2003
300 _a868
650 _aComputer Science
_93487
942 _cBE_BK
999 _c3051
_d3051