Harper, W. M. <br/><br/>
Operational Research / 
W.M. Harper. 
 - ed. 
 - Plymouth :  MacDonald and evans,  1975. 
 - xv, 301  p. ;    cm. 
<br/><br/><label>ISBN: </label>0712115145 :  $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operations research.