United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2007," PPI Detailed Report (January 2007) : 1-2. https://fraser.stlouisfed.org/title/63/item/21855/toc/362973 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "January 2007," PPI Detailed Report (January 2007) : 1-2. https://fraser.stlouisfed.org/title/63/item/21855/toc/362973 , accessed on April 19, 2024.