000 00274nam a2200121Ia 4500
008 200701s2011 xx 000 0 eng d
100 _aSTALLINGS
245 0 _aNetwork security essentials
250 _a4th
260 _bPEARSON
_c2011
300 _a417
942 _2ddc
_cGE
_013
999 _c5368
_d5368