Ullman, Jeffrey D <br/><br/>
A first course in database systems / 
Jeffrey D. Ullman and Jennifer Widom 
 - Upper Saddle River, N.J. :  Prentice Hall,  c1997 
 - xiii, 470 p. :  ill. ;  25 cm. 
<br/><br/> "An Alan R. Apt book." 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0138613370 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Database management