United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2009," PPI Detailed Report (May 2009) : 4-7. https://fraser.stlouisfed.org/title/63/item/21884/toc/72437 , accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2009," PPI Detailed Report (May 2009) : 4-7. https://fraser.stlouisfed.org/title/63/item/21884/toc/72437 , accessed on March 28, 2024.