Ullman, Jeffrey D.  <br/><br/>
Principles of database systems 
by Jeffrey D. Ullman 
 -  Computer Science Press 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Database management<br/>Query languages (Computer science)<br/>Relational databases
<br/><br/><label>Dewey Class. No.: </label>001.64  / ULL/P