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. "June 1969," Federal Reserve Bulletin (June 1969) : 170-170. https://fraser.stlouisfed.org/title/62/item/21414/toc/6037 , accessed on April 19, 2024.