Hornung, J. L. <br/><br/>
Radio operating questions and answers / 
by J. L. Hornung [and] Alexander A. Mckenzie 
 - 11th ed. 
 - New York :  McGraw-Hill Book ,  1952 
 - x, 557 p. :  ill. ;  20 cm. 
<br/><br/><label>ISBN: </label>Rs. 6.50