McMahon, Morgan E. <br/><br/>
A flick of the switch, 1930-1950 / 
by Morgan E. McMahon 
 - California :  Vintage Radio,  1975 
 - 311 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>0914126091 
<br/><br/><label>LCCN: </label>76-351632 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio--History<br/>Radio--Apparatus and supplies--Collectors and collecting<br/>Radio broadcasting--History--United States