de Rooy, Bill. <br/><br/>
Systems technology for schools / 
Bill de Rooy. 
 - iv, 174 pages. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-521-57792-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics.<br/>Electronics--Problems, exercises, etc.<br/>Mechanics.<br/>Mechanics--Problems, exercises, etc.<br/>System design.