000 00303nam a2200109Ia 4500
008 230621s9999 xx 000 0 und d
020 _a9788131769058
100 _aWilliam Stallings
_91632
245 0 _aNetwork Security Essentials : Applications and Standards
260 _bPearson Education
942 _cMCA
999 _c9274
_d9274