Ullman, Jeffrey D <br/><br/>
Principles of database systems 
Jeffrey D Ullman                                            
 - 2nd ed. 
 - New Delhi  Galgotia Publications  1985 
 - vii, 484p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Database systems
<br/><br/><label>Universal Decimal Class. No.: </label>681.31  / ULL