United States. Bureau of Labor Statistics. "National Compensation Survey: Bloomington-Normal, IL, April 2006 : Bulletin of the United States Bureau of Labor Statistics, No. 3135-36,"
National Compensation Survey (Wages and Salaries)
(January 2007).
https://fraser.stlouisfed.org/title/6009/item/582948, accessed on September 17, 2024.