Rich, Elaine. Knight, Kevin. <br/><br/>
Artificial intelligence 

 - 2nd ed. 
 - New Delhi  Mcgraw Hill  1991 
 - xvii, 621 
<br/><br/><label>ISBN: </label>70522634 
<br/><br/><label>Dewey Class. No.: </label>001.535  RIC;71