The  ARRL antenna compendium. Vol. 2 

 - Newington, Connecticut :   ARRL, American Radio Relay League,   1989. 
 - v. 2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ANTENAS<br/>MANUAL<br/>UNIPOLO<br/>YAGUI<br/>ACTIVIDAD SOLAR<br/>EFECTOS IONOSFERICOS
<br/><br/><label>Universal Decimal Class. No.: </label>621.396.67