000 00278nam a2200109Ia 4500
008 190830s9999 xx 000 0 und d
082 _a004.6 STA
100 _aWilliam Stallings
245 0 _aData and computer communications
260 _bDorling Kidersley
_c2007
942 _cBOOK
999 _c54937
_d54937