United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 1998," PPI Detailed Report (October 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21756/toc/397771 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 1998," PPI Detailed Report (October 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21756/toc/397771 , accessed on April 25, 2024.