william j clancey <br/><br/>
knowledge - based tutoring: the GUIDON program 

 - 
 -  MIT Press  1987 
 - 377 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-262-031323-x 
<br/><br/><label>Dewey Class. No.: </label>004.8