00373nam a22001337a 4500082001100000100002100011245002900032250001100061260005300072300000800125942000700133999001700140952008200157  a511CHU  aChurchill Ruel V  aOperational mathematics   a3rd ed  aNew DelhibInternational student ediction c1958  a481  cBK  c15156d15156  00104070aQUESTCLbSTd2016-01-14l0o511CHUp4769r2016-01-14 00:00:00yBK