Ackoff, Russell L. <br/><br/>
The art of problem solving /  
Russell L. Ackoff. 
 - New York :  John Wiley & Sons,  1978 
 - x, 214 pages :  illustrations ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0471858080 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem solving.