United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1983," PPI Detailed Report (May 1983) : 3-3. https://fraser.stlouisfed.org/title/63/item/21570/toc/268000 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1983," PPI Detailed Report (May 1983) : 3-3. https://fraser.stlouisfed.org/title/63/item/21570/toc/268000 , accessed on April 25, 2024.