Ackoff, Russel L. <br/><br/>
The Art of Problem Solving  eng. 
Ackoff, Russel L., Ackoff, Karen B. (ill. by) 
 - New York:  John Willey &  Sons,  1978. 
 - x, 214p.:  23cm. 
<br/><br/><label>ISBN: </label>0471042897 
<br/><br/><label>Dewey Class. No.: </label>658.403  / ACK