West, David, <br/><br/>
Why things don't work helicopter / 
David West. 
 - London :  David West Children's Books,  2007. 
 - 32 pages :  colored illustrations ;  30 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>1406205443 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helicopter.
<br/><br/><label>Dewey Class. No.: </label>629.1333352  / W52