00302nam a2200121Ia 45000030006000000080041000060400015000471000037000622450024000992600028001235460012001510050017001630STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aCourant Richard; Robbins Herbert  aWhat is mathematics  bOxford universityc1969  aEnglish20220125170024.0