Lanton, Sandy. <br/><br/>
The happy hackers / 
by Sandy Lanton. 
 - Oxford :  Heinemann,  1996. 
 - 48 p. :  ill ;  18 cm. 
 - Sunshine books 9 .
 - Sunshine books 9 .
<br/><br/><label>ISBN: </label>0435006924