00321nam a2200145Ia 45000030006000000080041000060400015000471000040000622450019001022500010001212600009001313000006001405460012001460050017001580STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKamke, E. Ed; Bagmihal Frederick Tr  aTheory of sets  aFirst  c1950  a0  aEnglish20220125165921.0