United States. President and Council of Economic Advisers (U.S.). "Output per Man-hour and Related Data, Private Economy," in United States. President and Council of Economic Advisers (U.S.). "1973," Economic Report of the President (1973) : 236-236. https://fraser.stlouisfed.org/title/45/item/8144/toc/422955 , accessed on June 20, 2024.