Wahlster, Wolfgang. <br/><br/>
GWAI - 82 :  6th German Workshop on Artificial Intelligence, Bad Honnef, Sept. 27. - Oct. 1, 1982 / 
Wolfgang Wahlster. 
 - Berlin :  Springer,  1982. 
<br/><br/><label>Universal Decimal Class. No.: </label>681.3