United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2008," PPI Detailed Report (June 2008) : 2-3. https://fraser.stlouisfed.org/title/63/item/21871/toc/211696 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2008," PPI Detailed Report (June 2008) : 2-3. https://fraser.stlouisfed.org/title/63/item/21871/toc/211696 , accessed on April 25, 2024.