United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2012," PPI Detailed Report (January 2012) : 2-3. https://fraser.stlouisfed.org/title/63/item/21914/toc/174846 , accessed on March 29, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2012," PPI Detailed Report (January 2012) : 2-3. https://fraser.stlouisfed.org/title/63/item/21914/toc/174846 , accessed on March 29, 2024.