00281nam a2200109Ia 4500008004100000082001700041100002300058245004100081250001200122260002700134300001000161150201s2012    xx            000 0 und d  a621.382bSTA  aStallings, William  aWireless communications and networks  a2nd Ed.  bPearsonaN.Delhic2012  a596p.