United States. Bureau of Labor Statistics. "April 1987," CPI Detailed Report (April 1987). https://fraser.stlouisfed.org/title/58/item/19274, accessed on March 19, 2024.
United States. Bureau of Labor Statistics. "April 1987," CPI Detailed Report (April 1987). https://fraser.stlouisfed.org/title/58/item/19274, accessed on March 19, 2024.