Snowdon, Lynda  1985. <br/><br/>
Look it Up:  the world of machines 
Snowdon, Lynda 
 - Second Edition. 
 - Jordan Hill Oxford  Macmillan Education Ltd  1985. 
 - 64p.  Includes Illustrations and Index  28cm. 
<br/><br/><label>ISBN: </label>0-431-00012-3