Ley, Willy,  1906-1969. <br/><br/>
Rockets;  the future of travel beyond the stratosphere /  
Willy Ley. 
 - New York :   The Viking Press,  1944. 
 - xi, 287 p.  illus., diagrs.  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COHETES
<br/><br/><label>Universal Decimal Class. No.: </label>629.76