United States. Bureau of Labor Statistics. "December 1969," CPI Detailed Report (December 1969). https://fraser.stlouisfed.org/title/58/item/22166, accessed on April 26, 2024.
United States. Bureau of Labor Statistics. "December 1969," CPI Detailed Report (December 1969). https://fraser.stlouisfed.org/title/58/item/22166, accessed on April 26, 2024.