United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "July 1998," PPI Detailed Report (July 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21753/toc/230599 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "July 1998," PPI Detailed Report (July 1998) : 3-4. https://fraser.stlouisfed.org/title/63/item/21753/toc/230599 , accessed on April 19, 2024.