000 00304nam a2200121Ia 4500
008 221221s9999 xx 000 0 und d
020 _a9788131761755
082 _a004
_bSTA/N
100 _aStallings, William
245 0 _aNetwork Security Essentials
260 _aNew Delhi
_bPearson
_c2012
942 _cBK
999 _c23541
_d23541