United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2015," PPI Detailed Report (May 2015) : 10-13. https://fraser.stlouisfed.org/title/63/item/495666/toc/509748 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Charts," in United States. Bureau of Labor Statistics. "May 2015," PPI Detailed Report (May 2015) : 10-13. https://fraser.stlouisfed.org/title/63/item/495666/toc/509748 , accessed on May 4, 2024.