Federal Reserve Bank of Chicago. "September 1958," Business Conditions (Federal Reserve Bank of Chicago) (September 1958). https://fraser.stlouisfed.org/title/5562/item/540147, accessed on April 18, 2024.
Federal Reserve Bank of Chicago. "September 1958," Business Conditions (Federal Reserve Bank of Chicago) (September 1958). https://fraser.stlouisfed.org/title/5562/item/540147, accessed on April 18, 2024.