Houghton, Bernard,  <br/><br/>
Online information retrieval systems :  an introduction manual to principles and practice / 
Bernard Houghton and John Convey. 
 - 2nd ed., rev 
 - London :  Bingley,  1984 
 - 205pages ;  24cm. 
<br/><br/><label>ISBN: </label>0851573630 
<br/><br/><label>Subjects--Topical Terms: </label><br/>On--line bibliographic searching<br/>Interactive computer systems<br/>Information storage and retrieval systems