Illinois
United States. Bureau of Labor Statistics. "Illinois," in United States. Bureau of Labor Statistics. "Employment, Hours and Earnings, States and Areas, 1988-94 : Bulletin of the United States Bureau of Labor Statistics, No. 2454," Employment, Hours, and Earnings, States and Areas (November 1994) : 173-194. https://fraser.stlouisfed.org/title/245/item/5878/toc/251926 , accessed on May 13, 2024.