United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "March 2001," PPI Detailed Report (March 2001) : 9-11. https://fraser.stlouisfed.org/title/63/item/21785/toc/248519 , accessed on April 28, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "March 2001," PPI Detailed Report (March 2001) : 9-11. https://fraser.stlouisfed.org/title/63/item/21785/toc/248519 , accessed on April 28, 2024.