United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "November 1981," PPI Detailed Report (November 1981) : 3-3. https://fraser.stlouisfed.org/title/63/item/21552/toc/297987 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "November 1981," PPI Detailed Report (November 1981) : 3-3. https://fraser.stlouisfed.org/title/63/item/21552/toc/297987 , accessed on May 4, 2024.