00311nam a2200133Ia 45000030006000000080041000060400015000471000023000622450044000852500010001292600009001395460012001480050017001600STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWilliam Baumol, J.  aEconomic theory and operations analysis  aThird  c1972  aEnglish20220125165608.0