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RF Spectrum Management: An introduction to the Radio Frequency Spectrum Management at National and International Levels by Sandra Cruz-Pol | Goodreads
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146.520 MHz 2m National Simplex Calling Frequency HAM Radio PopSockets Swappable PopGrip : Amazon.co.uk: Electronics & Photo
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NIST Time and Frequency Radio Stations: WWV, WWVH, and WWVB: Amazon.co.uk: U.S. Department of Commerce: 9781495291593: Books
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CRFS delivers national Radio Frequency (RF) spectrum monitoring project to Malta Communications Authority - CRFS - Spectrum Monitoring and Geolocation
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Radio operators playing a rock version of the Ukrainian National Anthem over Russian Military Frequencies : r/amateurradio
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