Federal Reserve Bank of Chicago. "March 1975," Business Conditions (Federal Reserve Bank of Chicago) (March 1975). https://fraser.stlouisfed.org/title/5562/item/540345, accessed on April 23, 2024.
Federal Reserve Bank of Chicago. "March 1975," Business Conditions (Federal Reserve Bank of Chicago) (March 1975). https://fraser.stlouisfed.org/title/5562/item/540345, accessed on April 23, 2024.