United States. Bureau of Labor Statistics. "Unemployed Persons by Industry and Class of Worker, Not Seasonally Adjusted," in United States. Bureau of Labor Statistics. "August 2006," The Employment Situation (September 1, 2006) : 15-15. https://fraser.stlouisfed.org/title/144/item/494793/toc/508575 , accessed on March 28, 2024.