Cloos, George W. and Cummins, Philip A. "Economic Upheaval in the Midwest," in Federal Reserve Bank of Chicago. "January/February 1984, Volume VIII, Issue 1," Economic Perspectives (Federal Reserve Bank of Chicago) (January/February 1984) : 3-14. https://fraser.stlouisfed.org/title/5288/item/552435/toc/521789 , accessed on April 18, 2024.