Hellman, Charles I. <br/><br/>
Elements of radio 

 - 3rd ed. 
 - London  ; D.Van Nostrand  , 1956 
 - xiii,354p. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering<br/>Radio Engineering
<br/><br/><label>Dewey Class. No.: </label>621.384  / HEL