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 1973," Federal Reserve Bulletin (June 1973) : 166-166. https://fraser.stlouisfed.org/title/62/item/21462/toc/148820 , accessed on March 29, 2024.