United States. Bureau of Labor Statistics. "National Compensation Survey: Occupational Wages in the West North Central Census Division, 2000 : Bulletin of the United States Bureau of Labor Statistics, No. 2547-4," National Compensation Survey: Occupational Wages in the United States (November 2001). https://fraser.stlouisfed.org/title/6084/item/584715, accessed on November 16, 2024.