United States. Bureau of Labor Statistics. "May 1981," The Employment Situation (June 5, 1981). https://fraser.stlouisfed.org/title/144/item/56062, accessed on May 8, 2024.
United States. Bureau of Labor Statistics. "May 1981," The Employment Situation (June 5, 1981). https://fraser.stlouisfed.org/title/144/item/56062, accessed on May 8, 2024.