00281nam a2200109Ia 4500008004100000041000800041082001600049100004000065245004000105260001900145365000700164230303s9999    xx            000 0 und d  aeng  a621.382 TAU  aTaub Herbert & G. Schelling Donald:  aPrinciples of Communication Systems  aNEW DELHIbTMH  cRS