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

 - 3rd ed. 
 - Princeton, N.J.,  New Delhi  Van Nostrand  Affilated East West Press  [1956] 
 - xiii, 354 p.  illus.  24 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Radio 
<br/><br/><label>Dewey Class. No.: </label>621.384  / HEL