Federal Reserve Bank of Chicago. "August 1971," Business Conditions (Federal Reserve Bank of Chicago) (August 1971). https://fraser.stlouisfed.org/title/5562/item/540302, accessed on April 26, 2024.
Federal Reserve Bank of Chicago. "August 1971," Business Conditions (Federal Reserve Bank of Chicago) (August 1971). https://fraser.stlouisfed.org/title/5562/item/540302, accessed on April 26, 2024.