Sundgren, Bo <br/><br/>
Theory of data bases 
Bo Sundgren 
 - New York  Petrocelli/Charter  1975 
 - 244 p. : ill. ; 25 cm. 
<br/><br/> Includes index 
<br/><br/>p. 238-241 
<br/><br/><label>ISBN: </label>0884053075 
<br/><br/><label>LCCN: </label>75-32409 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data base management