United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "February 2007," PPI Detailed Report (February 2007) : 1-2. https://fraser.stlouisfed.org/title/63/item/21856/toc/66140 , accessed on May 9, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "February 2007," PPI Detailed Report (February 2007) : 1-2. https://fraser.stlouisfed.org/title/63/item/21856/toc/66140 , accessed on May 9, 2024.