Federal Reserve Bank of Chicago. "October 1969," Business Conditions (Federal Reserve Bank of Chicago) (October 1969). https://fraser.stlouisfed.org/title/5562/item/540280, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "October 1969," Business Conditions (Federal Reserve Bank of Chicago) (October 1969). https://fraser.stlouisfed.org/title/5562/item/540280, accessed on April 19, 2024.