United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "April 1979," PPI Detailed Report (April 1979) : 5-7. https://fraser.stlouisfed.org/title/63/item/21521/toc/417544 , accessed on May 3, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "April 1979," PPI Detailed Report (April 1979) : 5-7. https://fraser.stlouisfed.org/title/63/item/21521/toc/417544 , accessed on May 3, 2024.