United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2011," PPI Detailed Report (January 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21901/toc/131971 , accessed on April 23, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2011," PPI Detailed Report (January 2011) : 2-3. https://fraser.stlouisfed.org/title/63/item/21901/toc/131971 , accessed on April 23, 2024.