Federal Reserve Bank of Chicago. "July 1970," Business Conditions (Federal Reserve Bank of Chicago) (July 1970). https://fraser.stlouisfed.org/title/5562/item/540289, accessed on May 16, 2024.
Federal Reserve Bank of Chicago. "July 1970," Business Conditions (Federal Reserve Bank of Chicago) (July 1970). https://fraser.stlouisfed.org/title/5562/item/540289, accessed on May 16, 2024.