Beatty, R.T. <br/><br/>
Radio data charts/ 
R.T. Beatty 
 - 2nd ed. 
 - London:  The Wireless World,  [19-?] 
 - 77 p.;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio--Charts, diagrams, etc.<br/>Radio frequency--Charts, Diagrams, etc.<br/>Radio waves--Charts, Diagrams, etc.
<br/><br/><label>Dewey Class. No.: </label>621.384083