United States. Bureau of Labor Statistics. "April 1979," PPI Detailed Report (April 1979). https://fraser.stlouisfed.org/title/63/item/21521, accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "April 1979," PPI Detailed Report (April 1979). https://fraser.stlouisfed.org/title/63/item/21521, accessed on April 18, 2024.