Duckworth, Walter Eric <br/><br/>
A guide to operational research.-- 2nd ed. 
W. E. Duckworth 
 - 2nd ed. 
 - London  Methuen  1965 
 - 156p.: ill. 
<br/><br/> Bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>OPERATIONS RESEARCH
<br/><br/><label>LC Class. No.: </label>T 57.6 Duc