United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2016," PPI Detailed Report (April 2016) : 2-2. https://fraser.stlouisfed.org/title/63/item/529790/toc/517529 , accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2016," PPI Detailed Report (April 2016) : 2-2. https://fraser.stlouisfed.org/title/63/item/529790/toc/517529 , accessed on April 18, 2024.