Systems technology for schools 
de Rooy, Bill. 
 -  Cambridge University Press.  1998 
 - iv, 174 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-521-57792-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics.
<br/><br/><label>Dewey Class. No.: </label>621.381 D44s 1998