Improving subject retrieval in on line catalogues 

 - London  British Library Research and Development  1990 
 - 2v. (xi, 1 
 - British library research paper   24, 72 .
<br/><br/><label>ISBN: </label>0712332197 
<br/><br/><label>Dewey Class. No.: </label>025.3132 Im7