00289nam a2200121Ia 45000030006000000080041000060400015000471000023000622450044000852600009001295460012001380050017001500STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWilliam Baumol, J.  aEconomic theory and operations analysis  c1963  aEnglish20220125170059.0