United States. Bureau of Labor Statistics. "May 1981," CPI Detailed Report (May 1981). https://fraser.stlouisfed.org/title/58/item/19382, accessed on April 24, 2024.
United States. Bureau of Labor Statistics. "May 1981," CPI Detailed Report (May 1981). https://fraser.stlouisfed.org/title/58/item/19382, accessed on April 24, 2024.