Just found a nice little archive of Ivan Allen related material at Georgia Tech. You can start here
Inside is a large PDF scan of a newsclipping scrapbook he kept in the 1970’s with all kinds of urban space related articles.
Just starting to dig through, but found these already:
As late as February 1976, they hadn’t decided if MARTA tracks on Peachtree ridge would be cut and cover or a tunnel!
Except for the necessity for very long escalators, I think they made the right choice. Many pages from an April 1976 issue of the short-lived weekly Atlanta Gazette:
Not really sure what Baldy is saying about Mayor Jackson here