Federal Reserve Bank of Chicago. Research Department and Federal Reserve Bank of Chicago. "The Heartland Keeps Beating, No. 106," Chicago Fed Letter (June 1996). https://fraser.stlouisfed.org/title/5287/item/535840, accessed on May 9, 2024.
Federal Reserve Bank of Chicago. Research Department and Federal Reserve Bank of Chicago. "The Heartland Keeps Beating, No. 106," Chicago Fed Letter (June 1996). https://fraser.stlouisfed.org/title/5287/item/535840, accessed on May 9, 2024.