00299nam a2200133Ia 45000030006000000080041000060400015000471000014000622450027000762500011001032600022001145460012001360050017001480STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSeely, S.  aElectron tube circuits  aSecond  bMcgraw hillc1958  aEnglish20220125170208.0