A gold mine!
https://worldradiohistory.com/Archive-All-Audio/Recording_Engineer_Producer.htm

So I ran a search on "Alembic", and my first hit was "The Grateful Dead - A Continual Development Of Concert Sound System Design For Twenty Years" by David Gans.

Page 96 of the PDF.

David, I somehow stumbled on the REP issues link, and also on that site is a large amount of goodies about famous studios and their exact layouts. An incredible resource.

Yes, there's a lot to explore.

I used to read those decades ago. I might well have recycled a bunch of them about 10 years ago.