00354nam a2200121Ia 4500008004100000100004400041245006900085250000600154260002100160260000900181300000800190650003400198221231s9999    xx            000 0 und d  aGracia, Alberto Leon and Widjaja, Indra 0aCommunication Networks Fundamental Concepts and Key Architecture  a2  bTata McGraw-Hill  c2005  a900  aElectronics and Communication