Jefferis, David  <br/><br/>
Helicopters 
David Jefferis; Illustrated by Rob Jobson, Terry Hadler and Michael Roffe 
 - London  Franklin Watts  1988 
 - 32 p. 
 - Wings The conquest of the air . <br/><br/> Includes index. 
<br/><br/> Explains the workings of helicopters and discusses helicopters' military, transportation, and rescue uses 
<br/><br/>  Grade level : 3 - 4  
<br/><br/><label>ISBN: </label>0531106365 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helicopters
<br/><br/><label>Dewey Class. No.: </label>j629.133 Jef   26