United States. Bureau of Labor Statistics. "December 1970," CPI Detailed Report (December 1970). https://fraser.stlouisfed.org/title/58/item/22169, accessed on May 7, 2024.
United States. Bureau of Labor Statistics. "December 1970," CPI Detailed Report (December 1970). https://fraser.stlouisfed.org/title/58/item/22169, accessed on May 7, 2024.