Duckworth, W. E. (Walter Eric) <br/><br/>
A guide to operational research / 
[by] w. E. Duckworth. 
 - "2nd ed. 1965.". 
 - London :  Methuen,  [1965] 
 - University paperbacks (UP120) .
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operations research.