Ullman, Jeffrey D. <br/><br/>
Principles of database systems / 

 - 3 rd. 
 - New Delhi,  Gagotia Publishing,  c2008. 
 - xi,670 p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>817155450 
<br/><br/><label>Dewey Class. No.: </label>005.75