Federal Reserve Bank of Chicago. "May 1975," Business Conditions (Federal Reserve Bank of Chicago) (May 1975). https://fraser.stlouisfed.org/title/5562/item/540347, accessed on May 1, 2024.
Federal Reserve Bank of Chicago. "May 1975," Business Conditions (Federal Reserve Bank of Chicago) (May 1975). https://fraser.stlouisfed.org/title/5562/item/540347, accessed on May 1, 2024.