Expert systems in reference services  

 - New York:   The Haworth Press,   1989  
 - xvii, 238p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference services 
<br/><br/><label>Subjects--Index Terms: </label>Library applications Catalog subject  
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.5:007.52   / M9