Penfold, R. A. <br/><br/>
How to build advance short wave recievers 
R. A. Penfold 
 -  c 1977 
<br/><br/><label>ISBN: </label>0900162678 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic apparatus and appliances--Testing--EL, EE
<br/><br/><label>Dewey Class. No.: </label>621.381 PEN