United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "October 1999," PPI Detailed Report (October 1999) : 10-12. https://fraser.stlouisfed.org/title/63/item/21770/toc/90417 , accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "October 1999," PPI Detailed Report (October 1999) : 10-12. https://fraser.stlouisfed.org/title/63/item/21770/toc/90417 , accessed on March 28, 2024.