Ullaman ,J.D. <br/><br/>
Principles of database systems/2nd ed. 

 - 2nd ed. 
 - New Delhi  Galgotia  2002 
 - 484p. 
<br/><br/><label>Subjects--Index Terms: </label>681.31.01 
<br/><br/><label>Dewey Class. No.: </label>681.31.01  / ULL