00376nam a2200145Ia 4500008004100000084001500041100001800056245003800074250002200112260001800134260000900152260002100161300001300182500003500195180424s9999    xx            000 0 und d  a621.384 Z2  a"Zeines, Ben" 0aElectronic Communications Systems  a\\197000ENGGPS000  aPrentice Hall  b1970  cEnglewood Cliffs  axiv+479p  aincludes index and biblioraphy