United States. Bureau of Labor Statistics. "Technical Notes," in United States. Bureau of Labor Statistics. "May 2014," PPI Detailed Report (May 2014) : 170-176. https://fraser.stlouisfed.org/title/63/item/21942/toc/312427 , accessed on May 2, 2024.
United States. Bureau of Labor Statistics. "Technical Notes," in United States. Bureau of Labor Statistics. "May 2014," PPI Detailed Report (May 2014) : 170-176. https://fraser.stlouisfed.org/title/63/item/21942/toc/312427 , accessed on May 2, 2024.