Federal Reserve Bank of Chicago. "August 1970," Business Conditions (Federal Reserve Bank of Chicago) (August 1970). https://fraser.stlouisfed.org/title/5562/item/540290, accessed on May 2, 2024.
Federal Reserve Bank of Chicago. "August 1970," Business Conditions (Federal Reserve Bank of Chicago) (August 1970). https://fraser.stlouisfed.org/title/5562/item/540290, accessed on May 2, 2024.