PREM KUMAR  GUPTA <br/><br/>
OPERATIONAL RESERCH  

 - RAM NAGAR ,NEW DELHI  S.CHAND &COMPANY LTD   1976 
<br/><br/><label>ISBN: </label>81-219-0281-9 
<br/><br/><label>Dewey Class. No.: </label>658.3  / GUP/O