Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Lubricating Oil Production," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "August 1940," Federal Reserve Bulletin (August 1940) : 129-129. https://fraser.stlouisfed.org/title/62/item/21028/toc/50067 , accessed on May 8, 2024.