United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "March 2013," PPI Detailed Report (March 2013) : 2-3. https://fraser.stlouisfed.org/title/63/item/21928/toc/221789 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "March 2013," PPI Detailed Report (March 2013) : 2-3. https://fraser.stlouisfed.org/title/63/item/21928/toc/221789 , accessed on April 25, 2024.