United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 1980," PPI Detailed Report (May 1980) : 5-7. https://fraser.stlouisfed.org/title/63/item/21534/toc/231598 , accessed on April 27, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 1980," PPI Detailed Report (May 1980) : 5-7. https://fraser.stlouisfed.org/title/63/item/21534/toc/231598 , accessed on April 27, 2024.