00284nam a2200121Ia 45000030006000000080041000060400015000471000022000622450040000842600009001245460012001330050017001450STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aGilleth Billy, E.  aIntroduction to operations research  c1985  aEnglish20220125170050.0