Federal Reserve Bank of Chicago. "September 1955," Business Conditions (Federal Reserve Bank of Chicago) (September 1955). https://fraser.stlouisfed.org/title/5562/item/540111, accessed on May 16, 2024.
Federal Reserve Bank of Chicago. "September 1955," Business Conditions (Federal Reserve Bank of Chicago) (September 1955). https://fraser.stlouisfed.org/title/5562/item/540111, accessed on May 16, 2024.