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

 - Potomac  Computer science press  1980 
 - [vi], 379p.  23cm. 
<br/><br/><label>ISBN: </label>0914894137 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMPUTER SCIENCE<br/>DATA PROCESSING
<br/><br/><label>Dewey Class. No.: </label>001.64  / ULL