United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 1998," PPI Detailed Report (January 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21747/toc/128869 , accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 1998," PPI Detailed Report (January 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21747/toc/128869 , accessed on March 28, 2024.