Pigdon, Keith <br/><br/>
Wheels 

 - Horwitz education,  New South Wales.  2003: 
 - 16 pages:  illustrations,  23 cm. 
<br/><br/> A short educational report explaining how wheels make work easier—showing when machines push vs. pull loads—and exploring their everyday uses. 
<br/><br/><label>ISBN: </label>0725322896 
<br/><br/><label>Dewey Class. No.: </label>629.2