00277nam a2200121Ia 4500008004100000100002000041245003700061250000600098260001200104260000900116300000800125650002200133221231s9999    xx            000 0 und d  aBentley, John P 0aPrincipels of Measurment systems  a3  bPearson  c2006  a480  aTelecommunication