REES, PETER. <br/><br/>
WHY DO SWINGS SWING. 

 -  Cambridge,  2010 
 - 16. 
<br/><br/><label>ISBN: </label>9780521137201 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical.--Movement.--Swings.
<br/><br/><label>Dewey Class. No.: </label>531 REE/W