Federal Reserve Bank of Chicago. "August 1972," Business Conditions (Federal Reserve Bank of Chicago) (August 1972). https://fraser.stlouisfed.org/title/5562/item/540314, accessed on April 18, 2024.
Federal Reserve Bank of Chicago. "August 1972," Business Conditions (Federal Reserve Bank of Chicago) (August 1972). https://fraser.stlouisfed.org/title/5562/item/540314, accessed on April 18, 2024.