00350nam a2200133Ia 45000030006000000080041000060400015000471000019000622450087000812500010001682600009001785460012001870050017001990STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aAngiras Shukla  aDynamic models and possibility of their application toplanned economic development  aFirst  c1972  aEnglish20220125165623.0