United States. Bureau of Labor Statistics. "March 1987," The Employment Situation (April 3, 1987). https://fraser.stlouisfed.org/title/144/item/56193, accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "March 1987," The Employment Situation (April 3, 1987). https://fraser.stlouisfed.org/title/144/item/56193, accessed on May 4, 2024.