United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "June 2001," PPI Detailed Report (June 2001) : 11-13. https://fraser.stlouisfed.org/title/63/item/21788/toc/427414 , accessed on April 26, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "June 2001," PPI Detailed Report (June 2001) : 11-13. https://fraser.stlouisfed.org/title/63/item/21788/toc/427414 , accessed on April 26, 2024.