United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2009," PPI Detailed Report (June 2009) : 2-3. https://fraser.stlouisfed.org/title/63/item/21876/toc/228843 , accessed on May 14, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2009," PPI Detailed Report (June 2009) : 2-3. https://fraser.stlouisfed.org/title/63/item/21876/toc/228843 , accessed on May 14, 2024.