United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2001," PPI Detailed Report (May 2001) : 11-14. https://fraser.stlouisfed.org/title/63/item/21787/toc/307827 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2001," PPI Detailed Report (May 2001) : 11-14. https://fraser.stlouisfed.org/title/63/item/21787/toc/307827 , accessed on April 19, 2024.