Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Selected Business Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "August 1958," Federal Reserve Bulletin (August 1958) : 88-88. https://fraser.stlouisfed.org/title/62/item/21284/toc/204914 , accessed on April 19, 2024.