Data base systems :  infortech state of the art report. 

 - Maidenhead, Berkshire, Eng. :  Infortech Information Limited,  c1975. 
 - x, 722 p. 
 - Infotech state of the art report ; no. 25 .
<br/><br/><label>ISBN: </label>0855392509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Databases.