00283nam a2200121Ia 45000030006000000080041000060400015000471000017000622450044000792600009001235460012001320050017001440STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBaumol, W.J.  aEconomic theory and operations analysis  c1963  aEnglish20220125165613.0