Hints and kinks for the radio amateur  vol. 4 
American Radio Relay League                                  
 - Connecticut  American Radio Relay League  1949 
 - 128p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NASA Thesaurus<br/>Radio Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>621.396  / AME