United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 1996," PPI Detailed Report (April 1996) : 3-4. https://fraser.stlouisfed.org/title/63/item/21726/toc/268808 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 1996," PPI Detailed Report (April 1996) : 3-4. https://fraser.stlouisfed.org/title/63/item/21726/toc/268808 , accessed on May 4, 2024.