United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "August 2009," PPI Detailed Report (August 2009) : 9-11. https://fraser.stlouisfed.org/title/63/item/21886/toc/402668 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "August 2009," PPI Detailed Report (August 2009) : 9-11. https://fraser.stlouisfed.org/title/63/item/21886/toc/402668 , accessed on April 25, 2024.