Ramani, S.. <br/><br/>
Knowledge Based Computer Systems /  

 - 1st ed /  
 - New Delhi :   Narosa Publishing House ,   1988 
 - p.546 :  
<br/><br/><label>ISBN: </label>81-85198-27-6 
<br/><br/><label>Dewey Class. No.: </label>Bvx  / N0