Inter-service ionosphere bureau <br/><br/>
Fundamental principles of inospheric transmission   

 - London  Her majesty's stationary office  1948 
 - 81p. 
 - Dept.of Scientific and industrial research and admiralty  Special report  No.17 .
<br/><br/><label>Dewey Class. No.: </label>621.  / 38411 N482