Ratcliffe, J. A. <br/><br/>
The physical principles of wireless. 
With a foreward by Sir E. V. Appleton. 
 - [9th ed., rev.] 
 - London,  Methuen;  [1952] 
 - 109 p.  illus.  18 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Radio  
<br/><br/><label>Dewey Class. No.: </label>621.3841  / RAT