United States. Bureau of Labor Statistics. "Machinery," in United States. Bureau of Labor Statistics. "April 1982," PPI Detailed Report (April 1982) : 36-41. https://fraser.stlouisfed.org/title/63/item/21557/toc/179062 , accessed on April 23, 2024.
United States. Bureau of Labor Statistics. "Machinery," in United States. Bureau of Labor Statistics. "April 1982," PPI Detailed Report (April 1982) : 36-41. https://fraser.stlouisfed.org/title/63/item/21557/toc/179062 , accessed on April 23, 2024.