Gupta, Prem Kumar & Hira,  D S <br/><br/>
Operation research 

 - S Chand, New Delhi  1998 
 - xvi,1055p figs. 
<br/><br/><label>ISBN: </label>81-219-0281-9 
<br/><br/><label>Dewey Class. No.: </label>658.4034 Gup/Hir