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

 - 2nd edition. 
 - New Delhi :  Galgotia Publisher,  2007 
 - 484. 
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer programmingprograms data
<br/><br/><label>Dewey Class. No.: </label>005.74  / ULL