United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 1985," PPI Detailed Report (April 1985) : 3-3. https://fraser.stlouisfed.org/title/63/item/21593/toc/209010 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 1985," PPI Detailed Report (April 1985) : 3-3. https://fraser.stlouisfed.org/title/63/item/21593/toc/209010 , accessed on April 19, 2024.