Penfold, R. A. <br/><br/>
How to build advanced short wave receivers  [Books]. 
R. A. Penfold 
 - London  Bernard Babani  1977 
 - Pages: 118 
<br/><br/><label>ISBN: </label>0900162678  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>Shortwave radio.
<br/><br/><label>Dewey Class. No.: </label>TK/6563  / PEN