Bradley, Ray.,  author. <br/><br/>
Understanding computer science  :  for advanced level / 
by Ray Bradley. 
 - Third edition. 
 - Cheltenham :  Stanley Thornes,   1970. 
 - xxvi, 709 pages :  illustrations ;  27 cm. 
<br/><br/> Includes answers.  Includes index. 
<br/><br/><label>ISBN: </label>0748719792 (paperback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers.<br/>Electronic data processing.