00306nam a2200133Ia 45000030006000000080041000060400015000471000017000622450044000792500011001232600009001345460012001430050017001550STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBaumol, W.J.  aEconomic theory and operations analysis  aFourth  c1985  aEnglish20220125165613.0