Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Labor Force, Employment, and Unemployment," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1972," Federal Reserve Bulletin (December 1972) : 111-111. https://fraser.stlouisfed.org/title/62/item/21456/toc/137637 , accessed on April 19, 2024.