United States. Bureau of Labor Statistics. "April 1967," CPI Detailed Report (April 1967). https://fraser.stlouisfed.org/title/58/item/22124, accessed on April 22, 2024.
United States. Bureau of Labor Statistics. "April 1967," CPI Detailed Report (April 1967). https://fraser.stlouisfed.org/title/58/item/22124, accessed on April 22, 2024.