United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "February 1998," PPI Detailed Report (February 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21748/toc/289709 , accessed on May 1, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "February 1998," PPI Detailed Report (February 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21748/toc/289709 , accessed on May 1, 2024.