United States. Bureau of Labor Statistics. "April 1987," The Employment Situation (May 8, 1987). https://fraser.stlouisfed.org/title/144/item/56018, accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "April 1987," The Employment Situation (May 8, 1987). https://fraser.stlouisfed.org/title/144/item/56018, accessed on April 25, 2024.