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. "February 1971," Federal Reserve Bulletin (February 1971) : 152-152. https://fraser.stlouisfed.org/title/62/item/21433/toc/5869 , accessed on April 25, 2024.