United States. President and Council of Economic Advisers (U.S.). "Gross and Net Private Domestic Investment," in United States. President and Council of Economic Advisers (U.S.). "1990," Economic Report of the President (1990) : 318-318. https://fraser.stlouisfed.org/title/45/item/8161/toc/98344 , accessed on April 25, 2024.