Ullman, Jeffery C. <br/><br/>
Principles of database systems / 

 - 3rd. 
 - New Delhi,  Galgotia Publications,  c2011. 
 - xi, 670p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>8175155450 
<br/><br/><label>Dewey Class. No.: </label>005.75