United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "August 1980," PPI Detailed Report (August 1980) : 3-3. https://fraser.stlouisfed.org/title/63/item/21537/toc/190663 , accessed on May 3, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "August 1980," PPI Detailed Report (August 1980) : 3-3. https://fraser.stlouisfed.org/title/63/item/21537/toc/190663 , accessed on May 3, 2024.