00428nam a2200181Ia 450000100060000000300040000600500170001000800410002702000180006804000130008608200180009910000220011724500590013926000090019830000110020754600070021870000210022514032OSt20190125114759.0140402s9999    xx            000 0 und d  a81-7635-258-6  cPK-LaUMT  a 004.6bDER-H  aDerfler, Frank J.  aHow networks workcDerfler, Frank J.<>Freed, Les, J.A.  c1999  a212 p.  aEN  aFreed, Les, J.A.