Federal Reserve Bank of Chicago. "February 1973," Business Conditions (Federal Reserve Bank of Chicago) (February 1973). https://fraser.stlouisfed.org/title/5562/item/540320, accessed on April 23, 2024.
Federal Reserve Bank of Chicago. "February 1973," Business Conditions (Federal Reserve Bank of Chicago) (February 1973). https://fraser.stlouisfed.org/title/5562/item/540320, accessed on April 23, 2024.