United States. Bureau of Labor Statistics. "Unemployed Persons by Reason for Unemployment, Sex, Age, and Color," in United States. Bureau of Labor Statistics. "December 1973," The Employment Situation (January 4, 1974) : 7-7. https://fraser.stlouisfed.org/title/144/item/56071/toc/513121 , accessed on April 17, 2024.