Federal Reserve Bank of Chicago. "June 1975," Business Conditions (Federal Reserve Bank of Chicago) (June 1975). https://fraser.stlouisfed.org/title/5562/item/540348, accessed on April 25, 2024.
Federal Reserve Bank of Chicago. "June 1975," Business Conditions (Federal Reserve Bank of Chicago) (June 1975). https://fraser.stlouisfed.org/title/5562/item/540348, accessed on April 25, 2024.