PREM KUMAR  GUPTA  DR.D.SHIRA <br/><br/>
PROBLEMS IN OPERATIONAL RESERCH 

 - RAM NAGAR ,NEW DELHI  S.CHAND &COMPANY LTD   1991 
<br/><br/><label>ISBN: </label>81-219-0968-6 
<br/><br/><label>Dewey Class. No.: </label>658.4034  / GUP/P