Some techniques of Operational research / 
prepared by the operational research group of the National Coal Board, edited by B. T. Houlden. 
 - 1st ed. 3rd impression. 
 - English Universities P. :  London,  1968. 
 - x, 155 pages :  illustrations. ;  22 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0340053968 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operations research.