Lee Browns <br/><br/>
Programming Expert Systems in OPS5:an introduction to rule based programming 

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 -  Addison-Wesley Publishing  1985 
 - 471 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-201-10647-7 
<br/><br/><label>Dewey Class. No.: </label>004.891