Rich, Elaine. <br/><br/>
Artificial intelligence / 
Elaine Rich, Kevin Knight. 
 - 2nd ed. 
 - New York :  McGraw-Hill,  c1991. 
 - xvii, 621 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0070522634 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Artificial intelligence.