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What is ARDF (Radio Orienteering)?
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Radio orienteering: the Hungarian youth brought home one silver and three bronze medals from the youth amateur radio "fox hunting" • National Media and Infocommunications Authority
Amazon.co.jp: Radio Orienteering: The ARDF Handbook : Titterington, Bob, Williams Ph.D., David, Deane, David: Foreign Language Books
On the Air Podcast — The Thrill of the Chase: Radio Orienteering - YouTube
USA Radio Orienteering Team - ARDF - Lori Huberman in the 3.5 MHz Classic at the 2018 ARDF World Championships. Photo by Juror Kurt Smet. | Facebook
Amateur radio direction finding - Wikipedia
Amazon.co.jp: Radio Orienteering in a Compact Area : 本