Gray, Peter M D <br/><br/>
Logic algebra and databases 

 -   Affiliated East-West Press Private Ltd., New Delhi  1988 
 - 294 
<br/><br/><label>ISBN: </label>962 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Data files and databases; Computer science
<br/><br/><label>Dewey Class. No.: </label>005.74  GRA-L