Federal Reserve Bank of Chicago. "July 1959," Business Conditions (Federal Reserve Bank of Chicago) (July 1959). https://fraser.stlouisfed.org/title/5562/item/540157, accessed on April 24, 2024.
Federal Reserve Bank of Chicago. "July 1959," Business Conditions (Federal Reserve Bank of Chicago) (July 1959). https://fraser.stlouisfed.org/title/5562/item/540157, accessed on April 24, 2024.