United States. Bureau of Labor Statistics. "December 1980," The Employment Situation (January 9, 1981). https://fraser.stlouisfed.org/title/144/item/56140, accessed on May 13, 2024.
United States. Bureau of Labor Statistics. "December 1980," The Employment Situation (January 9, 1981). https://fraser.stlouisfed.org/title/144/item/56140, accessed on May 13, 2024.