Walker, A.  <br/><br/>
Knowledge systems and Prolog: developing expert, database, and natural language systems  (Book) 

 - 2nd ed. 
 - Reading  Addison-Wesley  1990 
 - 538 p.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Expert systems (Computer science) Prolog (Computer program language)
<br/><br/><label>Universal Decimal Class. No.: </label>004.438=93PROLOG:004.82 WAL  / 15254