Council of Economic Advisers (U.S.) , United States. Congress. Joint Committee on the Economic Report, 1946-1956 and United States. Congress. Joint Economic Committee, 1956-. "Productivity and Related Data, Business Sector," in Council of Economic Advisers (U.S.) , United States. Congress. Joint Committee on the Economic Report, 1946-1956 and United States. Congress. Joint Economic Committee, 1956-. "December 1989," Economic Indicators (December 1989) : 18-18. https://fraser.stlouisfed.org/title/1/item/697/toc/244521 , accessed on March 28, 2024.