Balchen, Bernt <br/><br/>
The next fifty years of flight 

 - New York  The Viking press  1960 
 - xxiv, 214 p. 
<br/><br/><label>ISBN: </label>249345 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics
<br/><br/><label>Dewey Class. No.: </label>629.13  / BAL