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

 - New Delhi  Affiliated east-west press  1988 
 - 294p. 
<br/><br/><label>ISBN: </label>8185095825  99 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science<br/>Database
<br/><br/><label>Dewey Class. No.: </label>005.74  / GRA