Operational research 

 - London  English Universities Press UK      1961 
<br/><br/><label>Standard No.: </label>247,472 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X:B28P1:N5, K1