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 1952," Economic Report of the President (January 1952) : 179-179. https://fraser.stlouisfed.org/title/45/item/8121/toc/92935 , accessed on April 18, 2024.