Federal Reserve Bank of Chicago. "August 1966," Business Conditions (Federal Reserve Bank of Chicago) (August 1966). https://fraser.stlouisfed.org/title/5562/item/540242, accessed on April 25, 2024.
Federal Reserve Bank of Chicago. "August 1966," Business Conditions (Federal Reserve Bank of Chicago) (August 1966). https://fraser.stlouisfed.org/title/5562/item/540242, accessed on April 25, 2024.