United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "June 2011," PPI Detailed Report (June 2011) : 4-7. https://fraser.stlouisfed.org/title/63/item/21907/toc/36174 , accessed on May 2, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "June 2011," PPI Detailed Report (June 2011) : 4-7. https://fraser.stlouisfed.org/title/63/item/21907/toc/36174 , accessed on May 2, 2024.