Federal Reserve Bank of Chicago. "January 1966," Business Conditions (Federal Reserve Bank of Chicago) (January 1966). https://fraser.stlouisfed.org/title/5562/item/540235, accessed on April 30, 2024.
Federal Reserve Bank of Chicago. "January 1966," Business Conditions (Federal Reserve Bank of Chicago) (January 1966). https://fraser.stlouisfed.org/title/5562/item/540235, accessed on April 30, 2024.