United States. Bureau of Labor Statistics. "Manufacturing Sector - Appendix - Quarterly Data," in United States. Bureau of Labor Statistics. "Third Quarter 1992 [Preliminary]," Productivity and Costs (November 5, 1992) : 15-15. https://fraser.stlouisfed.org/title/131/item/55828/toc/465900 , accessed on April 19, 2024.