United States. Bureau of Labor Statistics. "April 1969," CPI Detailed Report (April 1969). https://fraser.stlouisfed.org/title/58/item/22163, accessed on April 24, 2024.
United States. Bureau of Labor Statistics. "April 1969," CPI Detailed Report (April 1969). https://fraser.stlouisfed.org/title/58/item/22163, accessed on April 24, 2024.