Gupta, Prem Kumar  _ Hira , D.S <br/><br/>
Problems in operation research  principles and solutions 

 - rev.ed 
 - New Delhi  S Chand  2020 
 - 1293 p.  22 cm.  PB 
<br/><br/> 1st edition in 1991 and reprint in 2020 
<br/><br/><label>ISBN: </label>9788121909686 
<br/><br/><label>Subjects--Personal Names: </label>   _ 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Operations research
<br/><br/><label>Dewey Class. No.: </label>658.4034  / GUP