Federal Reserve Bank of Chicago. "May 1958," Business Conditions (Federal Reserve Bank of Chicago) (May 1958). https://fraser.stlouisfed.org/title/5562/item/540143, accessed on April 18, 2024.
Federal Reserve Bank of Chicago. "May 1958," Business Conditions (Federal Reserve Bank of Chicago) (May 1958). https://fraser.stlouisfed.org/title/5562/item/540143, accessed on April 18, 2024.