United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2011," PPI Detailed Report (May 2011) : 8-10. https://fraser.stlouisfed.org/title/63/item/21906/toc/161956 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2011," PPI Detailed Report (May 2011) : 8-10. https://fraser.stlouisfed.org/title/63/item/21906/toc/161956 , accessed on April 25, 2024.