United States. Bureau of Labor Statistics. "National Compensation Survey: Seattle-Tacoma-Olympia, WA, December 2006 : Bulletin of the United States Bureau of Labor Statistics, No. 3140-12," National Compensation Survey (Wages and Salaries) (September 2007). https://fraser.stlouisfed.org/title/6009/item/583002, accessed on September 19, 2024.