United States. Bureau of Labor Statistics. "National Compensation Survey: Portland-Salem, OR-WA, September 2001 : Bulletin of the United States Bureau of Labor Statistics, No. 3110-65,"
National Compensation Survey (Wages and Salaries)
(June 2002).
https://fraser.stlouisfed.org/title/6009/item/582587, accessed on September 12, 2024.