HARLEY,R.J. <br/><br/>
Online searching: Principles and Practice 

 - London.  bowker Saur.  1990 
 - xvii, 387p. 
<br/><br/><label>ISBN: </label>0-408-02290-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>database structures<br/>retrieval facilities
<br/><br/><label>Dewey Class. No.: </label>025.524