United States. Bureau of Labor Statistics. "December 1987," The Employment Situation (January 8, 1988). https://fraser.stlouisfed.org/title/144/item/56001, accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "December 1987," The Employment Situation (January 8, 1988). https://fraser.stlouisfed.org/title/144/item/56001, accessed on April 25, 2024.