National Compensation Survey: Washington-Baltimore, DC-MD-VA-WV, July 1999 : Bulletin of the United States Bureau of Labor Statistics, No. 3100-33
United States. Bureau of Labor Statistics. "National Compensation Survey: Washington-Baltimore, DC-MD-VA-WV, July 1999 : Bulletin of the United States Bureau of Labor Statistics, No. 3100-33," National Compensation Survey (Wages and Salaries) (June 2000). https://fraser.stlouisfed.org/title/6009/item/582408, accessed on April 17, 2024.
United States Bureau of Labor Statistics