Harrison, John Allen. <br/><br/>
The story of the ionosphere :   or, Exploring with wireless waves /  
J. A. Harrison 
 - London :   Hulton Educational Publications ,   1958. 
 - 103 p. :    ill. ;    23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio waves--------<br/>Atmosphere, Upper--------
<br/><br/><label>Dewey Class. No.: </label>621.38411