00312nam a2200121Ia 45000030006000000080041000060400015000471000023000622450046000852600030001315460012001610050017001730STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHarvey Leibenstein  aEconomic backwardness and economic growth  bJohn Wiley and Sonsc1957  aEnglish20220125165630.0