Federal Reserve Bank of Chicago. "September 1975," Business Conditions (Federal Reserve Bank of Chicago) (September 1975). https://fraser.stlouisfed.org/title/5562/item/540351, accessed on April 18, 2024.
Federal Reserve Bank of Chicago. "September 1975," Business Conditions (Federal Reserve Bank of Chicago) (September 1975). https://fraser.stlouisfed.org/title/5562/item/540351, accessed on April 18, 2024.