00282nam a2200133Ia 45000030006000000080041000060400015000471000016000622450022000782500010001002600009001105460012001190050017001310STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aGratzer, G.  aUniversal Algebra  aFirst  c1968  aEnglish20220125170015.0