United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 2003," PPI Detailed Report (May 2003) : 3-4. https://fraser.stlouisfed.org/title/63/item/21811/toc/411037 , accessed on May 2, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 2003," PPI Detailed Report (May 2003) : 3-4. https://fraser.stlouisfed.org/title/63/item/21811/toc/411037 , accessed on May 2, 2024.