000 00325nam a2200145Ia 4500
008 160921s9999 xx 000 0 und d
020 _a981-240-614-X
082 _a641
100 _aDAVID JOHNSON
245 _aGUIDE TO NETWORKING ESSENTIALS
250 _a2nd
260 _bTHOMSON
_c2002
300 _a598
942 _cBK
999 _c33715
_d33715