Knowledge Systems and Prolong: Developing Expert, Database and Language Systems / 
Adrian Walker., Michael McCord., John .F Sowa and Walter .G Wilson 
 - 2nd edition 
 -  Addison-Wesley Publishing Company, Inc  c1990 
 - xiv, 538p.:  ill.; 
<br/><br/> include bibliographical references and index 
<br/><br/><label>ISBN: </label>0201524244 
<br/><br/><label>Dewey Class. No.: </label>006.3