Approaches to knowledge representation  an introduction 
ed. by G. A. Ringland and D. A. Duce. 
 - Letchworth  Research Studies Press  1988 
 - vi, 260p  incl. bibl., ind. 
 - Knowledge-based and expert systems series  1 .
<br/><br/><label>ISBN: </label>0863800645 
<br/><br/><label>Dewey Class. No.: </label>001.535  / N887