Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Production Worker Employment in Manufacturing Industries," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1969," Federal Reserve Bulletin (March 1969) : 178-178. https://fraser.stlouisfed.org/title/62/item/21411/toc/345460 , accessed on March 28, 2024.