United States. Bureau of Labor Statistics. "Productivity and Costs by Industry, 2000 : Productivity and Costs by Industry, 2000, USDL 02-237,"
Productivity and Costs by Industry
(April 23, 2002).
https://fraser.stlouisfed.org/title/9618/item/703974/content/pdf/prin_20020423, accessed on June 12, 2026.