Gray, Peter M.D.   <br/><br/>
Logic, algebra and databases   
by M. D. Peter Gray. 
 - New Delhi  Affiliated East-West  1984 
 - 294p.     
<br/><br/><label>ISBN: </label>8185095825   
<br/><br/><label>Dewey Class. No.: </label>005.74  / N843