United States. Bureau of Labor Statistics. "National Compensation Survey: Occupational Wages in the East North Central Census Division, December 2000 : Bulletin of the United States Bureau of Labor Statistics, No. 2553-3," National Compensation Survey: Occupational Wages in the United States (January 2003). https://fraser.stlouisfed.org/title/6084/item/584725, accessed on September 11, 2024.