Appleton, Edward <br/><br/>
The application of ionospheric data to radio communication 
Sir Edward Appleton and W.J.G. Beynon. 
 - London  Her Majesty's Stationary Office  1948 
 - 44p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus
<br/><br/><label>Universal Decimal Class. No.: </label>551.510.5  / APP