United States. Bureau of Labor Statistics. "June 1971," CPI Detailed Report (June 1971). https://fraser.stlouisfed.org/title/58/item/22270, accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "June 1971," CPI Detailed Report (June 1971). https://fraser.stlouisfed.org/title/58/item/22270, accessed on April 18, 2024.