United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2015," PPI Detailed Report (June 2015) : 2-2. https://fraser.stlouisfed.org/title/63/item/495673/toc/511677 , accessed on May 1, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 2015," PPI Detailed Report (June 2015) : 2-2. https://fraser.stlouisfed.org/title/63/item/495673/toc/511677 , accessed on May 1, 2024.