Bradley, Ray <br/><br/>
New understanding computer science for advanced level / 
Ray Bradley 
 - 4th ed. 
 - Cheltenham, UK :  Nelson Thornes,  1999 
 - 730 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0748740465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science