000 00310nam a2200121Ia 4500
008 190107s9999 xx 000 0 und d
020 _a9789352566601
100 _a"Stallings, william"
245 0 _aNetworks security essentials applications & standards
260 _bPearson INC
365 _b709/-
942 _cBK
999 _c855
_d855