00320nam a2200121Ia 45000030006000000080041000060400015000471000022000622450076000842600009001605460012001690050017001810STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aLipschutz Seymour  aSchaums outline of theory and problems of set theory and related topics  c1981  aEnglish20220125165921.0