I'm sure this has had a thread already but this is so cool.
There's so many cool old magazine scans here I figured I'd share it. There's stuff on big and small builders to explaining the difference between tubing types and type of build eg. Tig, mig, brazing etc. I didn't scan any of this, I'm just sharing it.
Hope you enjoy it.

https://bhovey.com/Masi/Scans/