00306nam a2200121Ia 45000030006000000080041000060400015000471000022000622450062000842600009001465460012001550050017001670STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aEvertt Hangen, E.  aOn the theory of social change how economic growth begins  c1962  aEnglish20220125165623.0