United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2014," PPI Detailed Report (April 2014) : 2-3. https://fraser.stlouisfed.org/title/63/item/21941/toc/406110 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2014," PPI Detailed Report (April 2014) : 2-3. https://fraser.stlouisfed.org/title/63/item/21941/toc/406110 , accessed on April 25, 2024.