00293nam a2200109Ia 4500008004100000041000800041082001600049100001900065245006900084260002300153365000700176230303s9999    xx            000 0 und d  aeng  a621.382 TOM  aTOMASI (WAYNE)  aElectronic Communication Systems : Fundamentals through Advanced  aNew DelhibPEARSON  cRS