United States. Bureau of Labor Statistics. "June 1981," PPI Detailed Report (June 1981). https://fraser.stlouisfed.org/title/63/item/21547, accessed on April 27, 2024.
United States. Bureau of Labor Statistics. "June 1981," PPI Detailed Report (June 1981). https://fraser.stlouisfed.org/title/63/item/21547, accessed on April 27, 2024.