United States. Bureau of Labor Statistics. "National Compensation Survey: St. Louis, MO-IL, June 1998 : Bulletin of the United States Bureau of Labor Statistics, No. 3095-14,"
National Compensation Survey (Wages and Salaries)
(February 1999).
https://fraser.stlouisfed.org/title/6009/item/582304, accessed on January 5, 2026.