Federal Reserve Bank of Chicago. Research Department and Federal Reserve Bank of Chicago. "The Midwest in the New Millennium, No. 152a," Chicago Fed Letter (April 2000). https://fraser.stlouisfed.org/title/5287/item/535897, accessed on May 6, 2024.
Federal Reserve Bank of Chicago. Research Department and Federal Reserve Bank of Chicago. "The Midwest in the New Millennium, No. 152a," Chicago Fed Letter (April 2000). https://fraser.stlouisfed.org/title/5287/item/535897, accessed on May 6, 2024.