High frequency - Wikipedia
SWLD - Shortwave Listeners Delight - HFGCS USA High Frequency Global Communication System Frequencies
Radio Scanner Guide - Part 3C: Civilian Aircraft
Radio Scanner Guide - Part 3D: Military Aircraft
Radartutorial
Business Radio Frequency Chart - ISM Band Chart
What's the difference between how HF and VHF/UHF radio waves travel? - Radiowave Communications LTD
FM 11-32 Chptr 4 FH Networks
Radio Frequencies for Space Communication
Here's how the wireless spectrum is divided up in the US | World Economic Forum
What are Radio Frequency bands and its uses? - RF Page
Navy Electricity and Electronics Training Series (NEETS), Module 17, 1-11 to 1-207 - RF Cafe
Tactical Radios | Thales Group
Radio Frequency Spectrum (Pretty sure this excludes military-allocated frequencies.) | Radio frequency, Communication system, Radio
FM 24-12 Chptr 3 AM Radio Operations
Determination of Level of Radio Frequency Field Exposure to Military Personnel from Tactical Field Expedient Antennas | Semantic Scholar
How can the military help alleviate radio frequency congestion | EUROCONTROL
The wireless spectrum crunch, illustrated - ExtremeTech
NTIA Special Publication 00-40 - Chapter 3
ESA - Satellite frequency bands
FCC License for Two-Way RadiosIntercoms and Two Way Radios
Radio Frequency Bands | TeraSense
