000 00304nam a2200121Ia 4500
008 211214s9999 xx 000 0 und d
100 _aWilliam Stallings
245 _aComputer Security : Principles and Practices
260 _bPearson
500 _a77446/19-20
650 _aEngg./VIII
942 _cBB
999 _c177091
_d177091