Federal Reserve Bank of Chicago. "January 1960," Business Conditions (Federal Reserve Bank of Chicago) (January 1960). https://fraser.stlouisfed.org/title/5562/item/540163, accessed on May 8, 2024.
Federal Reserve Bank of Chicago. "January 1960," Business Conditions (Federal Reserve Bank of Chicago) (January 1960). https://fraser.stlouisfed.org/title/5562/item/540163, accessed on May 8, 2024.