United States. Bureau of Labor Statistics. "August 1981," PPI Detailed Report (August 1981). https://fraser.stlouisfed.org/title/63/item/21549, accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "August 1981," PPI Detailed Report (August 1981). https://fraser.stlouisfed.org/title/63/item/21549, accessed on April 18, 2024.