McMahon, Morgan E. <br/><br/>
A flick of the switch, 1930-1950 / 
by Morgan E. McMahon. 
 - Palos Verdes Peninsula, Calif. :  Vintage Radio,  1975. 
 - 311 p. :  ill. ;  22 cm. 
 - Vintage radio series .
<br/><br/><label>ISBN: </label>0914126091 0914126105 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio--History.<br/>Radio--Equipment and supplies--Collectors and collecting.<br/>Radio broadcasting--History.--United States
<br/><br/><label>LC Class. No.: </label>TK 6547  / M478f 1975 
<br/><br/><label>Dewey Class. No.: </label>621.3841