United States. Bureau of Labor Statistics. "April 1972," CPI Detailed Report (April 1972). https://fraser.stlouisfed.org/title/58/item/22185, accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "April 1972," CPI Detailed Report (April 1972). https://fraser.stlouisfed.org/title/58/item/22185, accessed on March 28, 2024.