00280nam a2200121Ia 45000030006000000080041000060400015000471000030000622450028000922600009001205460012001290050017001410STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aMacmillan Dunchan William  aTheory of the potential  c1958  aEnglish20220125170022.0