United States. President and Council of Economic Advisers (U.S.). "Production and Exports of Selected Nonagricultural Commodities," in United States. President and Council of Economic Advisers (U.S.). "January 1948," Economic Report of the President (January 1948) : 142-142. https://fraser.stlouisfed.org/title/45/item/8114/toc/296968 , accessed on April 18, 2024.