United States. Bureau of Labor Statistics. "April 1980," PPI Detailed Report (April 1980). https://fraser.stlouisfed.org/title/63/item/21533, accessed on March 19, 2024.
United States. Bureau of Labor Statistics. "April 1980," PPI Detailed Report (April 1980). https://fraser.stlouisfed.org/title/63/item/21533, accessed on March 19, 2024.