00293nam a2200133Ia 45000030006000000080041000060400015000471000018000622450030000802500011001102600009001215460012001300050017001420STCL150530s9999 xx 000 0 und d aSTCLcSTCL aShaekei, R.G. aElectricity and magnetism aNineth c1942 aEnglish20220125170203.0