Ullman, Jeffrey D. <br/><br/>
Principles of database systems 
Jeffrey D. Ullman. 
 - 19th. ed.. 
 - New Delhi  Galgotia Pub.  2002 
 - vii, 448p; 25cm. 
<br/><br/><label>Dewey Class. No.: </label>005.74  / U02P