United States. Bureau of Labor Statistics. "December 1990," CPI Detailed Report (December 1990). https://fraser.stlouisfed.org/title/58/item/19399, accessed on March 18, 2024.
United States. Bureau of Labor Statistics. "December 1990," CPI Detailed Report (December 1990). https://fraser.stlouisfed.org/title/58/item/19399, accessed on March 18, 2024.