An interesting architecture magazine I discovered is Pencil Points: A Journal for the Drafting Room. Running from 1920 to 1943, Pencil Points was produced by, and for, working architects, not the more general public as with titles like Architecural Record.
Pencil Points Reader is a recent collection of articles spanning the journal’s run. It gives a great feel for what it was like to work in architecture at that time, and how they dealt with the Depression and the onslaught of European Modernism.
Nothing in the Reader mentions James Betelle, but he is in the June, 1931 issue. He took park in an Architect’s and Producer’s Symposium, discussing their “mutual problems”.