Federal Reserve Bank of Chicago. "October 1970," Business Conditions (Federal Reserve Bank of Chicago) (October 1970). https://fraser.stlouisfed.org/title/5562/item/540292, accessed on March 28, 2024.
Federal Reserve Bank of Chicago. "October 1970," Business Conditions (Federal Reserve Bank of Chicago) (October 1970). https://fraser.stlouisfed.org/title/5562/item/540292, accessed on March 28, 2024.