United States. Bureau of Labor Statistics. "Employed and Unemployed Persons by Occupation, Not Seasonally Adjusted," in United States. Bureau of Labor Statistics. "June 2014," The Employment Situation (July 3, 2014) : 25-25. https://fraser.stlouisfed.org/title/144/item/494887/toc/506047 , accessed on June 25, 2024.