00286nam a2200121Ia 45000030006000000080041000060400015000471000026000622450028000882600019001165460012001350050017001470STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHeckstall Smith, H.W.  aFirst electrical theory  bJ.M.Dentc1946  aEnglish20220125170105.0