Federal Reserve Bank of Chicago. "May 1959," Business Conditions (Federal Reserve Bank of Chicago) (May 1959). https://fraser.stlouisfed.org/title/5562/item/540155, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "May 1959," Business Conditions (Federal Reserve Bank of Chicago) (May 1959). https://fraser.stlouisfed.org/title/5562/item/540155, accessed on April 19, 2024.