00384nam a2200169Ia 4500003000500000008004100005020001800046040001900064082000700083100001500090245003700105250000600142260003600148300001000184365000800194546001200202STCL230729s9999    xx            000 0 und d  a9788131503072  aSTCLcSTCLbEN  222  aBlake, Roy 0aElectronic communication systems  a2  bThomson LearningaHaryanac2007  a985 p  b433  aEnglish