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

 - New delhi   Galgotia  1991 
 - vii,484 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Computer Science
<br/><br/><label>Dewey Class. No.: </label>001.61 Ul5,p