Lateral thinking :  a textbook of creativity. 

 - London:   Penguin Books Ltd,   1970.  
 - 257p. ;  21cm. 
<br/><br/><label>ISBN: </label>0140137793 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cognition<br/>Design<br/>Innovation<br/>Intelligence<br/>Knowledge<br/>MENTAL PROCESSES<br/>Techniques
<br/><br/><label>Dewey Class. No.: </label>1534