Gupta, Prem Kumar. <br/><br/>
Operations research. 

 - New Delhi :  S.Chand and Company Ltd,  1979. 
 - xii, 1395 p. :  ill. ;  25 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>8121902819 
<br/><br/><label>Dewey Class. No.: </label>658.409 GUP