United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "March 2003," PPI Detailed Report (March 2003) : 11-13. https://fraser.stlouisfed.org/title/63/item/21809/toc/235003 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "March 2003," PPI Detailed Report (March 2003) : 11-13. https://fraser.stlouisfed.org/title/63/item/21809/toc/235003 , accessed on April 25, 2024.