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 1966," Federal Reserve Bulletin (December 1966) : 99-99. https://fraser.stlouisfed.org/title/62/item/21384/toc/329365 , accessed on May 4, 2024.