Bradley, Ray <br/><br/>
Understanding computer science for advanced level (2nd ed.) 

 - 2nd ed. 
 - Cheltenham  Stanley Thornes  1991 
 - xxiv, 549p. : ill. 
<br/><br/><label>ISBN: </label>0748705635 
<br/><br/><label>LC Class. No.: </label>QA 76.55 Bra