000 00320nam a2200133Ia 4500
008 221231s9999 xx 000 0 und d
100 _aZwinky,  Elzabeth D
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245 0 _aBuilding Internet Firewalls
260 _bO Railly
260 _c2000
300 _a868
650 _aComputer Science
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942 _cBE_BK
999 _c3006
_d3006