Reference data for radio engineers /  
International Telephone and Telegraph Corporation 
 - New York :   Federal Telephone and Radio Corporation an asassociate of International Telephone and Telegraph Corporation,   1943-1975 
 - 6 v.  diagrs.  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RADIO
<br/><br/><label>Index Terms--Genre/Form: </label><br/>TABLAS
<br/><br/><label>Universal Decimal Class. No.: </label>621.396