United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2006," PPI Detailed Report (May 2006) : 5-8. https://fraser.stlouisfed.org/title/63/item/21847/toc/236651 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2006," PPI Detailed Report (May 2006) : 5-8. https://fraser.stlouisfed.org/title/63/item/21847/toc/236651 , accessed on April 19, 2024.