00305nam a2200133Ia 45000030006000000080041000060400015000471000022000622450038000842500011001222600009001335460012001420050017001540STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWagner Harvey, M.  aPrinciples of operations research  aSecond  c1989  aEnglish20220125170051.0