Federal Reserve Bank of Chicago. "September 1963," Business Conditions (Federal Reserve Bank of Chicago) (September 1963). https://fraser.stlouisfed.org/title/5562/item/540207, accessed on May 1, 2024.
Federal Reserve Bank of Chicago. "September 1963," Business Conditions (Federal Reserve Bank of Chicago) (September 1963). https://fraser.stlouisfed.org/title/5562/item/540207, accessed on May 1, 2024.