Duckworth, W. E. <br/><br/>
A guide to operational research / 
W. E. Duckworth 
 - 2nd ed. 
 - London :  Methuen,  c1965 [reptint 1967]. 
 - 156 p. :  illus. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operations research.
<br/><br/><label>Dewey Class. No.: </label>658.4034  / DUG 1967