Progressive Architecture was the later name of an American magazine on architecture, design, and drafting that began in 1920 as Pencil Points and, in 1945, changed for the final name until 1995.
You can find all the digitalized issues here: https://usmodernist.org/index-pa.htm
But the article I want to share with you is this, a real summary of 1966 about architectural toys. Enjoy!
PA-1966-04 by Marco Ginoulhiac on Scribd