Piggott, Derek <br/><br/>
Understanding gliding :  the principles of soaring flight /  
Derek Piggott  
 -  1977 
 - 259 pages :  illustrated ;  25 cm. 
<br/><br/> Includes index  with illustrations by the author 
<br/><br/><label>ISBN: </label>071361647 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics <br/>Airplanes<br/>Gliders (Aeronautics)
<br/><br/><label>Dewey Class. No.: </label>629.133  / P62u