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

 - 3rd Edition 
 - London  D. Van Nostrand Co. Inc  1956 
 - 354p 
<br/><br/>Charles I. Hellman: Elements of radio.  (3rd Edition)  London.  D. Van Nostrand Co. Inc, 1956.--(621.384HEL)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>621.384  / HEL