United States. President and Council of Economic Advisers (U.S.). "Gross Private Domestic Investment," in United States. President and Council of Economic Advisers (U.S.). "January 1950," Economic Report of the President (January 1950) : 159-159. https://fraser.stlouisfed.org/title/45/item/8118/toc/236298 , accessed on May 1, 2024.