BRIGGS, G.A. <br/><br/>
Sound reproduction 
/by G.A. Briggs 
 - Bradford  Wharfedale Wireless works  1949 
 - 143 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>83812 
<br/><br/><label>Dewey Class. No.: </label>621.3818  / BRI