National Compensation Survey: Iowa City, IA, December 1998 : Bulletin of the United States Bureau of Labor Statistics, No. 3095-50
United States. Bureau of Labor Statistics. "National Compensation Survey: Iowa City, IA, December 1998 : Bulletin of the United States Bureau of Labor Statistics, No. 3095-50," National Compensation Survey (Wages and Salaries) (August 1999). https://fraser.stlouisfed.org/title/6009/item/582340, accessed on April 25, 2024.
United States Bureau of Labor Statistics