As was mentioned on the last Sunday Net, we received a feedback form on the web site last week from Kathy Ackford, who is a youth services librarian for studymap.org. Kelly has been using some information from our web site in support of a class she has been teaching 10-14 year old students about radio.
One of Kelly's students, a young man named Dylan, has been doing research on radio along with his father. He found a link with some great information on the history of car radio. While this is oriented towards broadcast radio (not amateur radio), it is still quite an interesting read and includes a timeline of how car audio has developed over the decades.
If you are interested, Dylan's link is here: https://www.titlemax.com/articles/the-history-of-the-car-radio/
Note that I have scanned this link for malware and found it to be clean, but I have not traced all of the links within this page. Remember your computer security and make sure your browser and system patches are up to date!