What's On Short-Wave right now? - Resource Detail - The DXZone.com
Medium frequency - Wikipedia
Klingenfuss Shortwave Frequency Guide
United States Frequency Allocations: The Radio Spectrum (Poster) - 2016 Edition | U.S. Government Bookstore
Finding Shortwave Broadcasts, Frequencies, Schedules and Stations - SWLing.com
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Klingenfuss Shortwave Frequency Guide
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An Overview of Frequency Bands and Their Applications | PCB Design Blog | Cadence
The UHF Band
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Ham Radio Bands | NewHams.info
hf - Receiving shortwave frequencies from different countries (e.g. North Korea) - Amateur Radio Stack Exchange
Klingenfuss Shortwave Frequency Guide
Radio Frequencies for Space Communication
ITU-R: Managing the radio-frequency spectrum for the world
Klingenfuss Shortwave Frequency Guide
Klingenfuss Shortwave Frequency Guide
WRTH Online
Klingenfuss Shortwave Frequency Guide
