Fundamental principles of ionospheric transmission 
The Inter Service Ionosphere Bureau                          
 - London  Her Majesty's Stationary Office  1948 
 - 81p. 
 - Department of scientific and industrial research admiralty .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Ionospheric Transmission
<br/><br/><label>Universal Decimal Class. No.: </label>551.510.5  / INT