Campbell, George Ashley  1870- <br/><br/>
The collected papers of George Ashley Campbell 

 - New York :   American Telephone and Telegraph Company,   1937 
 - 548 p. :   il., gráfs., tablas ;   26 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IMPEDANCIA ELECTRICA<br/>AGRUPACIONES DE ANTENAS<br/>SISTEMAS TELEFONICOS<br/>TELEFONIA
<br/><br/><label>Universal Decimal Class. No.: </label>621.395