00445nam a2200157Ia 4500008004100000020001800041082001800059100002200077245005200099250000800151260003600159300003100195500001900226600002700245650001500272240925s9999    xx            000 0 und d  a9780070667556  a621.38413 FRE  aFrenzel, Louis E. 0aPrinciples of Electronic Communication Systems   a3rd  aNew York:bMc Graw HIllc,2008.  axviii,1136p.bNAfOriginal  aIncludes Index  aElectronic Engineering  aTechnology