United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 2011," PPI Detailed Report (October 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21911/toc/187072 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 2011," PPI Detailed Report (October 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21911/toc/187072 , accessed on April 25, 2024.