Harrison, J.A. <br/><br/>
The story of the ionosphere :  or Exploring with wireless waves / 
J.A. Harrison 
 - Great Britain :  Hulton Educational publications,  1958. 
 - 103 p. :  ill. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio waves
<br/><br/><label>Dewey Class. No.: </label>621.38411  / HAR 1958