United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2007," PPI Detailed Report (May 2007) : 4-7. https://fraser.stlouisfed.org/title/63/item/21858/toc/265099 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2007," PPI Detailed Report (May 2007) : 4-7. https://fraser.stlouisfed.org/title/63/item/21858/toc/265099 , accessed on April 25, 2024.