Hornung Julius Lawrence. <br/><br/>
Radio aperating, questions and answers 

 - 11 ed. 
 - New York :  McGraw-Hill,  1952 
 - 557 p.  : ilus. 
<br/><br/><label>LCCN: </label>16483 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio.
<br/><br/><label>Dewey Class. No.: </label>621.384  / H67