00303nam a2200133Ia 45000030006000000080041000060400015000471000019000622450037000812500013001182600009001315460012001400050017001520STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aTaha Hamdy, A.  aOPerations research introduction  aTwelveth  c2001  aEnglish20220125170051.0