United States. Bureau of Labor Statistics. "National Compensation Survey: Boston-Worcester-Lawrence, MA-NH-ME-CT, October 1998 : Bulletin of the United States Bureau of Labor Statistics, No. 3095-17,"
National Compensation Survey (Wages and Salaries)
(July 1999).
https://fraser.stlouisfed.org/title/6009/item/582307, accessed on December 16, 2025.