United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "July 2011," PPI Detailed Report (July 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21908/toc/404507 , accessed on April 17, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "July 2011," PPI Detailed Report (July 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21908/toc/404507 , accessed on April 17, 2024.