United States. Bureau of Labor Statistics. "National Compensation Survey: Raleigh-Durham-Chapel Hill, NC, July 1998 : Bulletin of the United States Bureau of Labor Statistics, No. 3095-61,"
National Compensation Survey (Wages and Salaries)
(September 1999).
https://fraser.stlouisfed.org/title/6009/item/582351, accessed on January 8, 2025.