History of Amateur Radio/Radio

https://en.wikipedia.org/wiki/History_of_amateur_radio#:~:text=Amateur%20radio%20came%20into%20being,their%20own%20interconnected%20telegraphic%20systems.

http://www.arrl.org/files/file/About%20ARRL/Ham_Radio_100_Years.pdf

https://w6sg.net/site/a-brief-history-of-amateur-radio/

https://www.electronics-notes.com/articles/history/amateur-ham-radio/history.php

http://www.astrosurf.com/luxorion/qsl-ham-history.htm

http://ac6v.com/history.php

https://earlyradiohistory.us/sec012.htm

https://en.wikipedia.org/wiki/History_of_radio

https://www.britannica.com/topic/radio

https://transition.fcc.gov/omd/history/radio/documents/short_history.pdf

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