United States. Bureau of Labor Statistics. "September 1981," The Employment Situation (October 2, 1981). https://fraser.stlouisfed.org/title/144/item/56060, accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "September 1981," The Employment Situation (October 2, 1981). https://fraser.stlouisfed.org/title/144/item/56060, accessed on March 28, 2024.