Duckworth, W. E. <br/><br/>
A guide to operational research 

 - London  ; Methuen & Co.  , 1970 
 - 156p. 
<br/><br/><label>ISBN: </label> 12 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operational Research
<br/><br/><label>Dewey Class. No.: </label>658.4034  / DUC