00297nam a2200133Ia 45000030006000000080041000060400015000471000021000622450032000832500010001152600009001255460012001340050017001460STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aFrank Knight, H.  aRisk uncertainty and profit  aFirst  c1957  aEnglish20220125165635.0