It may have been posted here before, but I thought I'd share a great resource for old archived audio publications that I recently ran across. Very thorough for sure. It's World Radio History, there is a great section for Audio Engineers publications that is quite extensive. Really great stuff hiding in here.
https://worldradiohistory.com/
Recording Engineer section - 70's to 90's
https://worldradiohistory.com/Archive-All-Audio/Archive-Recording-Engineer/