00281nam a2200121Ia 45000030006000000080041000060400015000471000016000622450043000782600009001215460012001300050017001420STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aMehta, M.M.  aMeasurement of industrial productivity  c1955  aEnglish20220125165638.0