00300nam a2200121Ia 45000030006000000080041000060400015000471000023000622450042000852600022001275460012001490050017001610STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSpiegel Murray, R.  aTheory and problems of real variables  bMcgraw hillc1974  aEnglish20220125165956.0