United States. Bureau of Labor Statistics. "May 1967," CPI Detailed Report (May 1967). https://fraser.stlouisfed.org/title/58/item/22075, accessed on April 23, 2024.
United States. Bureau of Labor Statistics. "May 1967," CPI Detailed Report (May 1967). https://fraser.stlouisfed.org/title/58/item/22075, accessed on April 23, 2024.