Numerisk Betydelig Milepæl uhf radio license parade Ærlig Antagelse
Do I Need a License to Use a Two-Way Radio? – The Best Ham Radio Articles, Tips & Reviews
FAA – FCC: your Radio Licence – cockpitseeker
Amazon.com: ARRL Ham Radio License Manual: All You Need to Become an Amateur Radio Operator: 9780872599635: H. Ward Silver, American Radio Relay League