United States. Bureau of Labor Statistics. "Employed and Unemployed Persons by Occupation, Not Seasonally Adjusted," in United States. Bureau of Labor Statistics. "August 2005," The Employment Situation (September 2, 2005) : 14-14. https://fraser.stlouisfed.org/title/144/item/494781/toc/508838 , accessed on March 28, 2024.