Ullman Jeffrey D <br/><br/>
Principles of database systems 
Ullman Jeffrey D 
 - 2 
 -  1984 
<br/><br/><label>Standard No.: </label>7690 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>D6,8(B),22, M4