Federal Reserve Bank of Chicago. "November 1970," Business Conditions (Federal Reserve Bank of Chicago) (November 1970). https://fraser.stlouisfed.org/title/5562/item/540293, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "November 1970," Business Conditions (Federal Reserve Bank of Chicago) (November 1970). https://fraser.stlouisfed.org/title/5562/item/540293, accessed on April 19, 2024.