00290nam a2200121Ia 45000030006000000080041000060400015000471000015000622450044000772600018001215460012001390050017001510STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSeth, M.L.  aTheory and practice of econoic planning  bS.Chandc1977  aEnglish20220125165626.0