Wilensky,Robert <br/><br/>
Planing and understanding: A computational approach to human reasoning 

 - London   Addition-Wesley Publishing Co.  1983 
<br/><br/><label>ISBN: </label>0-201-09590-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Computer science. 2.Artificial intelligence
<br/><br/><label>Dewey Class. No.: </label>001.535 W64,p