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. "April 1967," Federal Reserve Bulletin (April 1967) : 155-155. https://fraser.stlouisfed.org/title/62/item/21388/toc/150906 , accessed on April 17, 2024.