Gupta, Prem Kumar ; Hira, D S <br/><br/>
Operations research7th ed. 

 - S.Chand and company  New Delhi  2018 
 - xii,1498 
<br/><br/>
<br/><br/><br/>E 
<br/><br/><label>Universal Decimal Class. No.: </label>001.424  / Gup/Hir