Houghton, Bernard  . <br/><br/>
Online information retrieval systems : an introductory manual to principles and practice /  
Bernard Houghton and John Convey. 
 - London :   Clive Bingley ,   1986. 
 - 205p. :   ills ;   21cm .  
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0851573630  UKP 13.50 
<br/><br/><label>Subjects--Index Terms: </label>INFORMATION RETRIEVAL SYSTEM 
<br/><br/><label>Dewey Class. No.: </label>025.524  / HOU/O