United States. Bureau of Labor Statistics. "December 1991," CPI Detailed Report (December 1991). https://fraser.stlouisfed.org/title/58/item/19411, accessed on May 14, 2024.
United States. Bureau of Labor Statistics. "December 1991," CPI Detailed Report (December 1991). https://fraser.stlouisfed.org/title/58/item/19411, accessed on May 14, 2024.