00466nam a22001697a 450000500170000000800410001702000180005804100080007608200170008410000380010124500560013925000080019526000380020350000160024165000160025765300230027320260921163336.0250207b        |||||||| |||| 00| 0 eng d  a9788121909686  aeng  a519.92 G P K  aGupta, Prem Kumar and Hira, D. S.  aOperation ResearchcPrem Kumar Gupta and D. S. Hira  a1st  aNew Delhi :bSultan Chand, c2013  aMathematics  aMathematics  aOperation research