Harper, W. M. <br/><br/>
Operational research / 
W. M. Harper 
 - 2nd ed. 
 -  1982 
<br/><br/><label>ISBN: </label>0712115439 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operational research
<br/><br/><label>Dewey Class. No.: </label>511  / HAR