00381nam a2200169Ia 4500003000500000008004100005020001800046040001900064082000700083100002300090245003700113250000600150260002500156300001000181365000800191546001200199STCL230729s9999    xx            000 0 und d  a9788131715369  aSTCLcSTCLbEN  222  aStallings, William 0aData and computer communications  a8  bPearsonaNoidac2012  a834 p  b560  aEnglish