00284nam a2200133Ia 45000030006000000080041000060400015000471000018000622450022000802500010001022600009001125460012001210050017001330STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHellman, C.I.  aElements of radio  aThird  c1956  aEnglish20220125170211.0